case study nutrition in plants class 7

Case Study Questions Class 7 Science Nutrition in Plants

Case study questions class 7 science chapter 2 nutrition in plants.

CBSE Class 7 Case Study Questions Science Nutrition in Plants. Important Case Study Questions for Class 7 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Nutrition in Plants.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 7 Science Nutrition in Plants

Case study 1

Carbohydrates,proteins, fats, vitamins and minerals are components of food. These components of food are called nutrients and are necessary for our body.All living organisms require food. Plants can synthesise food for themselves but animals including humans cannot. They get it from plants or animals that eat plants. Thus,humans and animals are directly or indirectly dependent on plants.Plants are the only organisms that can prepare food for themselves by using water, carbon dioxide and minerals.The raw materials are present in their surroundings.The nutrients enable living organisms to build their bodies, to grow, to repair damaged parts of their bodies and provide the energy to carry out life processes. Nutrition is the mode of taking food by an organism and its utilization by the body.

The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic ( auto = self; trophos = nourishment) nutrition. Therefore,plants are called autotrophs. Animals and most other organisms take in food prepared by plants. They are called heterotrophs ( heteros = other).

Que. 1) What are the components of food?

(a) Vitamins

(b) Carbohydrates

(c) Proteins

(d) All of the above

Que. 2) Which organism are autotrophs?

(b) Animals

(c) Bacteria

Que. 3) Plants produce food by using which of the following components.

(b) Carbon dioxide

(d) Both (a) & (b)

Que. 4) Define autotrophic nutrition?

Que. 5) What are the things enabled by nutrients to living organisms?

Que. 1) (d) All of the above

Que. 2) (d) Plants

Que. 3) (d) Both (a) & (b)

Que. 4) Answer: it is the mode of nutrition in which organisms like plants make food on their own from simple substances.

Que. 5) Answer: nutrients enable the living beings to grow, to build their bodies, to repair damaged parts like tissues of the body and also provide energy to carry out metabolism.

Case study 2

Leaves are the food factories of plants. Therefore, all the raw materials must reach the leaf. Water and minerals present in the soil are absorbed by the roots and transported to the leaves. Carbon dioxide from air is taken in through the tiny pores present on the surface of leaves. These pores are surrounded by ‘guard cells’. Such pores are called stomata.Water and minerals are transported to the leaves by the vessels which run like pipes throughout the root, the stem, the branches and the leaves. They form a continuous path or passage for the nutrients to reach the leaf. They are called vessels. The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesise (prepare) food from carbon dioxide and water.Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis ( Photo : light; synthesis :to combine). So we find that chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis. It is a unique process on the earth . The solar energy is captured by the leaves and stored in the plant in the form of food. Thus, sun is the ultimate source of energy for all living organisms.

Que. 1) What are the food factories of plants?

(d) None of the above

Que. 2) Leaves contain ……………………………………………………………………… pigment.

(a) Chlorophyll

(b) Green pigment

(c) carotenoid

Que. 3) …………………………………………………………………… is the ultimate source of energy for all living organisms.

(c) Infrared light

(d) Visible light

Que. 4) How does the leaves capture the sunlight energy?

Que. 5) Define photosynthesis?

Que. 1) (a) Leaves

Que. 2) (d) Both (a) & (b)

Que. 3) (b) Sun

Que. 4) Answer: leaves capture the sunlight energy with the help of a green pigment called chlorophyll which is present in the mesophyll cells of leaves.

Que. 5 ) Answer: The process of synthesis of food from carbon dioxide and water in the presence of sunlight is called as photosynthesis.

Case study 3

Plants synthesise carbohydrates through the process of photosynthesis. Thecarbohydrates are made of carbon, hydrogen and oxygen. These are used to synthesise other components of food such as proteins and fats. But proteins are nitrogenous substances which contain nitrogen. Nitrogen is present inabundance in gaseous form in the air.

However, plants cannot absorb nitrogen in this form. Soil has certain bacteria that convert gaseous nitrogen into a usable form and release it into the soil. These are absorbed by the plants along with water. Also, you might have seen farmers adding fertilisers rich in nitrogen to the soil. In this way the plants fulfil their requirements of nitrogen along with the other constituents. Plants can then synthesise proteins and vitamins.

Besides leaves, photosynthesis also takes place in other green parts of the

Plant — in green stems and green branches. The desert plants have scale- orspine-like leaves to reduce loss of water by transpiration. These plants havegreen stems which carry out photosynthesis.

Que. 1) Carbohydrates are made up of which of the following components?

(a) Hydrogen

Que. 2) …………………………………………………..…… is a nitrogen containing compound.

(a) Carbohydrates

(b) Hydrogen

(d) Proteins

Que. 3) Which organisms convert gaseous nitrogen into a useable form?

(a) Earthworm

(c) Microbe

(d) Bacteria

Que. 4) How does desert plants reduce loss of water by transpiration?

Que. 5) How do plants fulfil their requirements of nitrogen?

Que. 2) (d) Proteins

Que. 3) (d) Bacteria

Que. 4) Answer: Desert plants have scaly or spiny leaves as compared to other normal plants to reduce water loss by transpiration.

Que. 5) Answer: Certain bacterias present in soil converts gaseous nitrogen into more useable form and release it into soil and also nitrogen containing fertilizers are added to soil to fulfil nitrogen requirement of plants

Case study 4

Oxygen which is essential for the survival of all organisms is produced during photosynthesis. In the absence ofphotosynthesis, life would be impossible on the earth.During photosynthesis, chlorophyll containing cells of leaves, in the presence of sunlight, use carbon dioxide and water to synthesise carbohydrates. The process can be represented in an equation: During the process oxygen is released. The presence of starch in leaves indicates the occurrence of photosynthesis. Starch is also a carbohydrate

Carbon dioxide+ water   ——– sunlight——–> carbohydrate+ oxygen

Que. 1) Which of the following organism produces oxygen?

Que. 2) Photosynthesis occurs in the presence of light?

(c) Both (a)&(b)

Que. 3) ………………………………………………………………… component is essential for the survival of all the living organisms.

(c) Nitrogen

(d) Hydrogen

Que. 4) Write the equation of photosynthesis?

Que. 5) What is the indication of the occurrence of photosynthesis in a plant?

Que. 1) (b) Plants

Que. 2) (a) True

Que. 3) (a) Oxygen

Que. 4) Answer: 6CO 2 + 6H 2 O    UV LIGHT     C 6 H 12 0 6 + 6O 2

Que. 5) Answer : The presence of reserve food material (i.e. Starch) in the leaves of plant indicates the occurrence of photosynthesis.

Case study 5

Take two potted plants of the same kind. Keep one in the dark (or in a black box)for 72 hours and the other in sunlight. Perform iodine test with the leaves of both the plants. Record the results. Now leave the pot which was earlier kept in the dark, in the sunlight for 3 – 4 days and perform the iodine test again on its leaves. Record the observations in a notebook. The leaves other than green also have chlorophyll. The large amount of red, brown and other pigments mask the green color.

Photosynthesis takes place in these leaves also. You often see slimy, green patches in ponds or stagnant water bodies. These are generally formed by the growth of organisms called algae. Algae are green in color because they contain chlorophyll which gives them the green color. Algae can also preparetheir own food by photosynthesis.

Que. 1) For how many hours does the potted plant needs to be kept in dark.

(a) 42 hours

(b) 65 hours

(c) 2 hours

(d) 72 hours

Que. 2) Which colour of leave have the maximum chlorophyll?

Que. 3) ……………………………………………………………….. are the slimy green patches in the pond.

(b) Bacteria

Que. 4) Which organism other than plant can form its own food and through which process?

Que. 5) Give a reason. The formation of green patches form in a pond?

Que. 1) (d) 72 hours

Que. 2) (d) Green

Que. 3) (c) Algae

Que. 4) Answer: Algae is the other organism which can form its own food through a process called photosynthesis

Que. 5) Answer: green patches are formed in the pond due to the uncontrolled growth of algae and algae are green in colour.

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Case Study Questions for Class 7 Science Chapter 1 Nutrition in Plants

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[Download] Case Study Questions for Class 7 Science Chapter 1 Nutrition in Plants

Here we are providing case study or passage-based questions for class 7 science chapter 1 Nutrition in Plants.

Case Study/Passage Based Questions

The bodies of living organisms are made of tiny units called cells. Cells can be seen only microscope. Some organisms are made of only one cell. The cell is enclosed by a thin boundary, called the cell membrane.

• The smallest structure units of a living organism is (a) a cell (b) a tissue (c) either a cell or a tissue (d) none of these
• In bigger bodies there are a large number of cells, whereas in some organisms there is only one cell. The cell can be seen (a) with naked eye (b) under the microscope (c) both the above are correct (d) cell cannot be seen by us
• Cell membrane (a) is the thin outer boundary of the cell (b) is a semi-permeable membrane (c) both the above are correct (d) none of the above is correct

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Case study or passage-based questions in class 7 Science typically require students to read a given scenario or passage and answer questions based on the information provided. These questions assess students’ comprehension, analytical thinking, and application of scientific concepts. 

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• Develop comprehension skills:  Focus on improving your reading comprehension skills. Practice reading passages or articles and try to summarize the main points or extract relevant information. Pay attention to details, vocabulary, and the overall structure of the passage.
• Understand scientific concepts:  Ensure that you have a solid understanding of the scientific concepts discussed in class. Review the fundamental principles and theories related to each topic.
• Make connections:  Try to connect the information provided in the case study to the concepts you have learned in class. Identify any cause-effect relationships, patterns, or relevant scientific principles that apply to the situation.
• Practice critical thinking:  Develop your critical thinking skills by analyzing and evaluating the information given in the case study. Think logically, consider multiple perspectives, and draw conclusions based on the evidence provided.
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• Nutrition in Plants Class 7 Case Study Questions Science Chapter 1

Last Updated on April 5, 2024 by XAM CONTENT

Hello students, we are providing case study questions for class 7 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 7 science. In this article, you will find case study questions for cbse class 7 science chapter 1 Nutrition in Plants.

Table of Contents

Case Study Questions on Nutrition in Plants

Question 1:

Read the given passage below and answer the question:

Carnivorous plant is especially adapted for capturing and digesting insects and other animals by means of ingenious pitfalls and traps. There are more than 600 known species of carnivorous plants. The apparent trapping mechanism, which is always a modified leaf is a distinctive feature to these plants. The pitcher plant is an example of a carnivorous plant. The leaf of the Pitcher plant is modified into pitcher like structure to trap the insects. The apex of the leaf acts like a lid which can open and close the mouth of the pitcher.

Q.1. Insect eating carnivorous plants are also called ________plant. (a) autotrophic (b) saprophytic (c) insectivorous (d) symbiotic

Difficulty Level: Easy

Ans. Option (c) is correct. Explanation: Carnivorous plants eat insects for their food requirements, so they are called insectivorous plants.

Q.2. One of the most important nutrients a pitcher plant need from insects is: (a) Carbon dioxide (b) Nitrogen (c) Water (d) Oxygen

Ans. Option (b) is correct. Explanation: Pitcher plants grow in soil that is deficient in nitrogen content so they feed on insects to obtain the nitrogen.

Q.3. Consider the following statements about the Pitcher plant: (A) It is a parasite. (B) The leaves are green in colour. (C) The hair present inside the lid is directed downward. (D) Digestive juice is secreted in the apex of the leaf. The correct statements are: (a) (A) and (B) (b) (B) and (C) (c) (C) and (D) (d) (A), (B) and (D)

Difficulty Level: Difficult

Ans. Option (b) is correct. Explanation: Pitcher plant is not a parasite. The plants are grouped under carnivorous plants as they feed upon insects. The digestive juices secreted in the pitcher, the modified part of leaf.

Q.4. What type of mode of nutrition is found in pitcher plants?

Ans. The pitcher plants have chlorophyll so they perform photosynthesis to produce their own food however, they grow in soil that lacks nitrogen content so, they feed on insects to obtain the nitrogen needed for their growth. Hence, they have both autotrophic as well as a partial heterotrophic mode of nutrition.

Q.5. How does a pitcher plant catch insects? (Medium)

Difficulty Level: Medium

Ans. When the insects land in the pitcher its lid closes and the insects are trapped and entangled into the hair. Digestive juices are secreted in the pitcher so the insects get digested and nutrients get absorbed.

Nutrition in Animals Class 7 Case Study Questions Science Chapter 2

Topics from which case study questions may be asked.

• Define nutrients.
• Discuss the mode of nutrition in plants.
• Describe the process of photosynthesis.
• List the things required for the process of photosynthesis.
• Discuss what are saprotrophs.
• Describe the symbiosis relationship.
• Discuss the nutrients replenishment in soil.

For further practice on case study questions related to Class 7 Science Chapter 1 Nutrition in Plants, we recommend exploring the link given below.

Frequently Asked Questions (FAQs) on Nutrition in Plants Case Study Questions

Q1: what are case study questions for cbse examinations.

A1: Case study questions in CBSE examinations typically involve scenarios or real-life examples, requiring students to apply their understanding of concepts to solve problems or analyze situations.

Q2: Why are case study questions important for understanding class 7 science chapters?

A2: Case study questions provide a practical context for students to apply theoretical knowledge to real-world situations, fostering deeper understanding and critical thinking skills.

Q3: How should students approach answering case study questions for CBSE?

A3: Students should carefully read the case study, identify the key issues or problems presented, analyze the information provided, apply relevant concepts and principles of plant nutrition, and formulate well-supported solutions or responses.

Q4: Are there any resources available online for students to practice case study questions on class 7 science chapters for CBSE exams?

A4: Yes, several educational websites offer case study questions for CBSE students preparing for science examinations. We also offer a collection of case study questions for all classes and subject on our website. Visit our  website  to access these questions and enhance your learning experience.

Q5: How can students effectively prepare for case study questions on nutrition in plants for CBSE exams?

A5: Effective preparation strategies include regular revision of concepts, solving practice questions, analyzing case studies from previous exams, seeking clarification on doubts, and consulting with teachers or peers for guidance and support.

Q6: How can teachers incorporate case study questions on nutrition in plants class 7 science into classroom teaching?

A6: Teachers can integrate case studies into lesson plans, group discussions, or interactive activities to engage students in active learning, promote problem-solving skills, and facilitate a deeper understanding of nutrition in plants.

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NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

Chapter 1 Nutrition in Plants Class 7 Science NCERT Solutions

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NCERT Solutions for Class 7 SCIENCE – Chapter 1 – Nutrition In Plants

Table of Contents

NCERT SOLUTIONS- NUTRITION IN PLANTS

NCERT Solutions for Class 7 Science Chapter 1 Nutrition In Plants is the essential study material to perfect Nutrition In Plants topics. The NCERT Class 7 Science solutions provided here correctly answer NCERT textbook questions. Solutions curated in a comprehensive manner will help students understand the subtopics in this chapter in a better way.

IMPORTANT SUB-TOPICS MENTIONED IN THE NCERT CLASS 7 SCIENCE CHAPTER 1 NUTRITION IN PLANTS:

NCERT Solutions for Class 7 Science Chapter 1 Nutrition In Plants has the following sub-topics as given below:

NCERT SOLUTIONS CLASS 7 SCIENCE CHAPTER 1 NUTRITION IN PLANTS:

1. Why do organisms take food?

ANS- Energy is a necessity for all living things. Abiotic components like soil, air, water, and sunlight help plants prepare their food to get nutrients. In contrast, animals must consume food in order to gain nutrients from either plants or other animals; as a result, animals must consume food in order to obtain both nutrition and energy.

2. Distinguish between a parasite and a saprophyte.

3. How would you test the presence of starch in leaves?

ANS- Take two identical potted plants. 72 hours should pass with one in the dark and the other in the light. Use the two plants’ leaves to conduct the iodine test in the manner described below. After 3–4 days, repeat the iodine test once more on the leaves of the pot that was previously kept in the dark.

Iodine test: Put iodine solution on the leaf.

Observation: 

• The leaves of a plant kept in sunlight will develop a blue-black colour, which denotes the presence of starch.
• The leaves of plants stored in the darkroom won’t exhibit a blue-black colour. This displays the lack of starch.

4. Give a brief description of the process of synthesis of food in green plants.

ANS- To make their food, green plants undergo a process called photosynthesis. The steps are as follows.

• The plant’s leaves receive water that has been delivered from the plant’s roots.
• Through stomata, carbon dioxide from the air enters the leaves. This diffuses in the chlorophyll-containing cell.
• With the help of sunlight, water molecules are broken down into Hydrogen and Oxygen.
• Carbohydrates are created when carbon dioxide reacts with oxygen and hydrogen.

5. Show with the help of a sketch that plants are the ultimate source of food.

6. Fill in the blanks.

(a) Green plants are called _________________ since they synthesise their own food.

(b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis, solar energy is absorbed by the pigment called ___________.

(d) During photosynthesis, plants take in ______________________ and release __________________ gas.

• Chlorophyll
• Carbon dioxide and oxygen

7. Name the following.

i) A parasitic plant with a yellow, slender and branched stem.

ii) A plant that is partially autotrophic.

iii) The pores through which leaves exchange gases.

ii) Pitcher plant

iii) Stomata

8. Tick the correct answer.

a. Cuscuta is an example of:

(i) Autotroph

(ii) parasite

(iii) saprotroph

b. The plant which traps and feeds on insects is:

(i) Cuscuta

(ii) China rose

(iii) pitcher plant

• (ii) Parasite
• (iii) Pitcher Plant

9. Match the items given in Column I with those in Column II.

10. Mark ‘T’ if the statement is true and ‘F’ if it is false.

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

(iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

11. Choose the correct option from the following:

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals

ANS- (ii) Stomata

12. Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

(i) roots (ii) stem (iii) flowers (iv) leaves

ANS- (iv) Leaves

13. Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?

ANS- Large greenhouses are used to cultivate fruit and vegetable crops because they give enough temperature and weather protection from the outside elements.

Farmers can benefit from growing fruits and vegetables in greenhouses by

• Crops are shielded from illnesses and bad weather by it.
• It shields crops from the wind and pests.

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NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants : Earlier, you studied the fact that all living organisms require food and the main differences between plants and animals. In C lass 7 Science Chapter 1 , you will also study the different complex chemical substances, such as carbohydrate, which are the products of photosynthesis, and oxygen, which is the molecule that is produced during photosynthesis. Nutrition in Plants Class 7 Solutions provide answers to each question in the NCERT Textbook. This solution is part of NCERT Solutions for Class 7 . Scroll down to go through the questions and answers given in NCERT Solutions for Class 7 Science Chapter 1 .

After going through N utrition in Plants Class 7 , you must be able to understand all the concepts. In NCERT Solutions for Class 7 Science Chapter 1, you will learn that plants can synthesise food for themselves, but animals, including humans, cannot. They get it from plants or animals that eat plants. Thus, humans and animals are directly or indirectly dependent on plants. You need to study the complete NCERT Class 7 Science Chapter 1 carefully, then only you will understand the NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.

Class 7 Science Chapter 1 Question Answer contains all the questions based on the nutrition of plants and their mechanisms. You will study in S cience Class 7 Chapter 1 that all organisms need food and utilise it to get energy for the growth and maintenance of their body and all the green plants synthesize food for themselves by a process called photosynthesis. That's why they are called autotrophs. There are a few plants that take food from the host plant instead of making it inside. If you need help in finding NCERT solutions of book to any other class, then don't worry NCERT Solutions will help you out. Students are recommended to go through NCERT Solutions for Class 7 to score high marks in their examination.

Download the PDF of NCERT Solutions for Class 7 Science Chapter 1 – Nutrition in Plants

Download PDF

NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants: Solved Exercise Questions:

Nutrition in plants class 7 questions and answers:.

Q1. Why do organisms take food?

Organisms take food to:

(i) Get the energy to carry out life processes.

(ii) Build thier bodies.

(iii) To grow.

(iv) Repair damaged parts of their bodies.

Nutrition in Plants Class 7 NCERT Solutions:

Q2. Distinguish between a parasite and a saprotroph.

Difference between Parasites and Saprotrophs:

Class 7 Science Chapter 1 Question Answer:

Q3. How would you test the presence of starch in leaves?

To test the presence of starch in leaves: Perform iodine test by adding iodine solution to the leaves, if there is starch present on the leaves then iodine makes a complex of dark blue color with the starch.

Hence we can test the presence of starch in the leaves.

Nutrition in Plants Class 7 Solutions:

Q4. Give a brief description of the process of synthesis of food in green plants.

The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesize (prepare) food (carbohydrates) from carbon dioxide and water. Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis.

The process equation as follows:

Class 7 Science Chapter 1 NCERT Solutions:

Q5 . Show with the help of a sketch that plants are the ultimate source of food.

Following is the Food chain diagram to show that plant is the ultimate source of food:

Class 7 Nutrition in Plants NCERT Solutions:

Q6. Fill in the blanks:

(a) Green plants are called _________________ since they synthesise their own food.

(b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis solar energy is absorbed by the pigment called ___________.

(d) During photosynthesis plants take in ______________________ and release __________________ gas.

(a) Green plants are called autotrophs since they synthesise their own food.

(b) The food synthesised by plants is stored as starch. (c) In photosynthesis solar energy is absorbed by the pigment called chlorophyll . (d) During photosynthesis plants take in carbon dioxide and release oxygen gas.

Class 7 Science Ch 1 Question Answer

Q7. Name the following:

(i)A parasitic plant with yellow, slender and branched stem.

Cuscuta (Amarbel) is a parasitic plant with yellow, slender and branched stem.

Q7. Name the following :

(ii) A plant that is partially autotrophic.

Pitcher plant is partially autotrophic plant.

As Pitcher plant is an insectivorous plants and insectivorous plants are not complete autotrophs but are partially autotrophs.

(iii) The pores through which leaves exchange gases.

Stomata pores are responsible through which leaves exchange gases.

NCERT Solution of Class 7th Chapter 1:

Q8. Tick the correct answer:

Cuscuta is an example of : (i) autotroph (ii) parasite (iii) saprotroph (iv) host

Cuscuta is an example of :

(iI) parasite

(b) The plant which traps and feeds on insects is: (i) Cuscuta (ii) china rose (iv) pitcher plant (iv) rose

The plant which traps and feed on insects is:

(iv) pitcher plant

Nutrition in Plants for Class 7 Questions with Answers:

Q9. Match the items given in Column I with those in Column II: Column I Column II Chlorophyll Rhizobium Nitrogen Heterotrophs Cuscuta Pitcher plant Animals Leaf Insects Parasite

Match the columns:

Class 7 Science Chapter 1 Solution:

Q10. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

(i) False , Oxygen is released during photosynthesis.

(ii) False , Plants which synthesise their food are called autotrophs.

(iii) True , The product of photosynthesis is not a protein.

(iv) True , Solar energy is converted into chemical energy during photosynthesis.

Science Chapter 1 Class 7 Solutions:

Q11. Choose the correct option from the following:

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals

(ii) Stomata takes in carbon dioxide from air for photosynthesis.

Q12. Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

(i) roots (ii) stem (iii ) flowers (iv) leaves

(iv) leaves takes carbon dioxide from the atmosphere.

Class 7 Science Chapter 1 Question Answer

Q13. Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers?

Farmers grow fruits and vegetable crops inside large greenhouse because it protects it from high blowing wind, and rodents also greenhouse protects the plant from the climatic conditions of outside and it can have its own suitable temperature for the growth of plants.

Farmers get advantages of the following things:

(i) They have control over their climatic conditions (Temperature, humidity etc.)

(ii) Free from pests, rodents and also from birds and animals so they have increased producibility.

NCERT Solutions for Class 7 Science Chapter 1 – Nutrition in Plants

Important Topics in Class 7 Science Chapter 1 Nutrition in Plants:

What are the benefits of NCERT solutions for Class 7 Science Chapter 1 Nutrition in Plants:

• Nutrition in Plants Class 7 Solutions will also boost your knowledge.
• NCERT is the basis of your learning.
• NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants will also help you to understand all the concepts easily.
• You will get all the answers to Science Chapter 1 Class 7 and it will help you score good marks in your school exam.
• Nutrition in Plants Class 7 NCERT Solutions PDF is easy to download and use offline.
• The Solutions for Ch 1 Science Class 7 are prepared by subject experts as per the latest CBSE syllabus.

If you are facing any issue in understanding the answers to the above questions, then don't worry and again go through that NCERT book and try to understand all the concepts of every topic, and then write the answers to all these questions on your own and then compare them with NCERT solutions for Class 7 Science chapter 1 Nutrition in Plants. You will see that your knowledge, as well as your understanding of these concepts, will increase, and you will be able to explain the answers in a better way.

NCERT Solutions for Class 7th Science: Chapter-Wise

Ncert solutions for class 7: subject wise, also check ncert books and ncert syllabus here:.

• NCERT Books Class 7 Science
• NCERT Syllabus Class 7 Science
• NCERT Books Class 7
• NCERT Syllabus Class 7

We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.

Frequently Asked Question (FAQs)

Nutrition is a process in which any organism obtains its food to lead a life .There are two types of nutrition: autotrophic and heterotrophic .

Here are the topics covered in NCERT Class 7 Science chapter 1

• Mode of Nutrition in Plants 
• Photosynthesis -Food Making Process in Plants 
• other Modes Of Nutrition in Plants 
• Saprotrophs 
• How Nutritions are Replenished In the Soil 

There are 13 questions in NCERT Class 7 Science chapter 1

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Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy , IIT Kharagpur , JMI New Delhi . 

Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive. 

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

Finance Executive

Product manager.

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

Stock Analyst

Individuals who opt for a career as a stock analyst examine the company's investments makes decisions and keep track of financial securities. The nature of such investments will differ from one business to the next. Individuals in the stock analyst career use data mining to forecast a company's profits and revenues, advise clients on whether to buy or sell, participate in seminars, and discussing financial matters with executives and evaluate annual reports.

A Researcher is a professional who is responsible for collecting data and information by reviewing the literature and conducting experiments and surveys. He or she uses various methodological processes to provide accurate data and information that is utilised by academicians and other industry professionals. Here, we will discuss what is a researcher, the researcher's salary, types of researchers.

Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

Safety Manager

A Safety Manager is a professional responsible for employee’s safety at work. He or she plans, implements and oversees the company’s employee safety. A Safety Manager ensures compliance and adherence to Occupational Health and Safety (OHS) guidelines.

Conservation Architect

A Conservation Architect is a professional responsible for conserving and restoring buildings or monuments having a historic value. He or she applies techniques to document and stabilise the object’s state without any further damage. A Conservation Architect restores the monuments and heritage buildings to bring them back to their original state.

Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

Highway Engineer

Highway Engineer Job Description:  A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

Field Surveyor

Are you searching for a Field Surveyor Job Description? A Field Surveyor is a professional responsible for conducting field surveys for various places or geographical conditions. He or she collects the required data and information as per the instructions given by senior officials. 

Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

Veterinary Doctor

Speech therapist, gynaecologist.

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

Are you searching for an ‘Anatomist job description’? An Anatomist is a research professional who applies the laws of biological science to determine the ability of bodies of various living organisms including animals and humans to regenerate the damaged or destroyed organs. If you want to know what does an anatomist do, then read the entire article, where we will answer all your questions.

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

Photographer

Photography is considered both a science and an art, an artistic means of expression in which the camera replaces the pen. In a career as a photographer, an individual is hired to capture the moments of public and private events, such as press conferences or weddings, or may also work inside a studio, where people go to get their picture clicked. Photography is divided into many streams each generating numerous career opportunities in photography. With the boom in advertising, media, and the fashion industry, photography has emerged as a lucrative and thrilling career option for many Indian youths.

An individual who is pursuing a career as a producer is responsible for managing the business aspects of production. They are involved in each aspect of production from its inception to deception. Famous movie producers review the script, recommend changes and visualise the story. 

They are responsible for overseeing the finance involved in the project and distributing the film for broadcasting on various platforms. A career as a producer is quite fulfilling as well as exhaustive in terms of playing different roles in order for a production to be successful. Famous movie producers are responsible for hiring creative and technical personnel on contract basis.

Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism , Advertising , Marketing Management . Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

Individuals who opt for a career as a reporter may often be at work on national holidays and festivities. He or she pitches various story ideas and covers news stories in risky situations. Students can pursue a BMC (Bachelor of Mass Communication) , B.M.M. (Bachelor of Mass Media) , or  MAJMC (MA in Journalism and Mass Communication) to become a reporter. While we sit at home reporters travel to locations to collect information that carries a news value.  

Corporate Executive

Are you searching for a Corporate Executive job description? A Corporate Executive role comes with administrative duties. He or she provides support to the leadership of the organisation. A Corporate Executive fulfils the business purpose and ensures its financial stability. In this article, we are going to discuss how to become corporate executive.

Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

Production Manager

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

Process Development Engineer

The Process Development Engineers design, implement, manufacture, mine, and other production systems using technical knowledge and expertise in the industry. They use computer modeling software to test technologies and machinery. An individual who is opting career as Process Development Engineer is responsible for developing cost-effective and efficient processes. They also monitor the production process and ensure it functions smoothly and efficiently.

AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

ITSM Manager

Automation test engineer.

An Automation Test Engineer job involves executing automated test scripts. He or she identifies the project’s problems and troubleshoots them. The role involves documenting the defect using management tools. He or she works with the application team in order to resolve any issues arising during the testing process. 

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• Nutrition in Plants Class 7 Notes CBSE Science Chapter 1 (Free PDF Download)
• Revision Notes

Exam - Focused Revision Notes for CBSE Class 7 Science Chapter 1 - Nutrition in Plants

Nutrition in plants Class 7 notes can be easily accessed online by students who want to prepare thoroughly for their exams. The experts at Vedantu have carefully prepared these revision notes based on the updated syllabus that covers all the aspects of the chapter. These revision notes cover the fundamentals of the chapter and build a strong base for the students to understand these topics in a specialized manner in higher classes. NCERT notes for Class 7 Science Chapter 1 educate the students about nutrition in plants and about the various processes by which these nutrients can be derived. Download NCERT Solutions Revision Notes PDF for all subjects for your exam preparation. Maths Students who are looking for the better solutions ,they can download Maths NCERT Solutions Class 7 to help you to revise complete syllabus and score more marks in your examinations.

Important Topics covered in CBSE Class 7 Science Chapter 1 Nutrition in Plants

Living and Non-living Organisms

Single and Multi-cellular organisms

Autotrophs and Heterotrophs

Photosynthesis

Chloroplasts

Chlorophyll

Nutrients being replenished in the soil

Other Modes of Nutrition: 

Symbiotic Relationship

Nitrogen Fixation 

Saprotrophs

Insectivorous Plants

Download CBSE Class 7 Science Revision Notes 2023-24 PDF

Also, check CBSE Class 7 Science revision notes for other chapters:

Access Class 7 Science Chapter – 1 - Nutrition in Plants Notes

Nutrition refers to how an organism consumes food and how the body processes it.

Nutrients are the components of food that give the body nutrition.

All creatures consume food and use it to obtain energy for body growth and upkeep.

Photosynthesis is the mechanism through which green plants produce their own food. They are autotrophic organisms.

Photosynthesis : In the presence of sunshine, green plants prepare their own food using chlorophyll (found in green plants), carbon dioxide, and water absorbed from the environment. Photosynthesis is the name for this process. For food synthesis, plants use simple chemical ingredients such as carbon dioxide, water, and minerals.

For photosynthesis to occur, chlorophyll and sunshine are required. Photosynthesis produces complex chemical compounds such as sugars.

With the help of chlorophyll, solar energy is stored in the form of food in the leaves. During photosynthesis, oxygen is created.

Living species use the oxygen generated during photosynthesis to survive.

Fungi get their food from rotting, dead things. They are saprotrophs or saprotrophic organisms. Cuscuta plants are parasitic. They eat the host plant's food.

Heterotrophs are plants and animals that rely on others for their nutrition.

Parasitic Creatures are parasitic organisms that live on the bodies of other organisms.

All parasitic plants eat other plants in one of two ways:

Partial Parasites: They get some of their sustenance from the host, for example, a painted cup.

Total Parasites, such as mistletoe, are fully reliant on the host for nourishment.

Saprophytic organisms are those that feed on dead and decaying plant and animal debris.

Mushrooms, molds, and some fungi and bacteria are examples.

Insectivorous Plants: Green plants that get their nutrition from both the soil and the atmosphere, as well as small insects. Pitcher plant, bladderwort, and Venus flytrap, for example.

Symbiosis is a type of nutrition in which two or more individuals work together to meet their nutritional needs.

The relationship between algae and fungus can be seen in the form of lichens on tree trunks. The fungus provides water to algae, and algae provide food to fungus.

Class 7 Science Chapter 1: Nutrition in Plants – In a Nutshell

To prepare for their exams, students can utilize Class 7 Science Chapter 1 notes which provide a concise and effective study resource. These notes enable students to grasp the concepts easily, build confidence and be well-prepared for their exams. The chapter focuses on the concept of nutrition in plants and organisms.

The notes highlight the meaning and significance of nutrition in plant growth and well-being. The modes of nutrition, including autotrophic and heterotrophic organisms, are explained. The crucial role of photosynthesis in plant nutrition and the significance of chlorophyll and chloroplasts in this process are emphasized.

Vedantu experts have provided detailed explanations and examples to aid students' understanding of photosynthesis, chlorophyll and chloroplasts. The notes also cover nutrition in various types of plants and organisms, such as non-chlorophyll plants, insectivorous plants, saprophytic organisms and parasitic organisms. The symbiotic relationship between organisms for nutritional needs is also explored.

By referring to these notes, students gain a comprehensive understanding of nutrition, its importance, and its various aspects in different organisms. The summarized bullet points facilitate easy memorization and serve as a helpful revision guide for students preparing for their exams.

Key Features of Class 7 Science Chapter 1 Nutrition in Plants

Available in PDF format

Covers all important topics and sub-topics of Nutrition in Plants

Easy-to-understand explanations 

Precise short notes

Prepared by Biology subject-experts

Can be downloaded for free of cost

These notes are as per the updated CBSE syllabus for Class 7 Science

Benefits of Studying Class 7 Science Chapter 1 Nutrition in Plants

These notes are prepared by our subject experts to help students learn and revise all topics covered in the chapter on Nutrition in Plants thoroughly before the exam.

These notes are available in PDF format so that students can download them conveniently and refer to them on any device like laptops, tabs, smartphones.

All topics covered in the chapter on Nutrition in Plants are explained with proper examples, diagrams, and definitions in these revision notes.

Students can go through these revision notes the day before their exam to understand the important concepts in a concise manner without having to spend a lot of time turning the pages of the book.

Our experts have prepared these notes in reference to the latest CBSE guidelines for Class 7 Science, so students will be able to answer questions from this chapter effectively in their exams.

Chapter wise Revision Notes for Class 7 Science

Chapter 2 - Nutrition in Animals Notes

Chapter 3 - Fibre to Fabric Notes

Chapter 4 - Heat Notes

Chapter 5 - Acids, Bases and Salts Notes

Chapter 6 - Physical and Chemical Changes Notes

Chapter 7 - Weather, Climate and Adaptations of Animals to Climate Notes

Chapter 8 - Winds, storms and cyclones Notes

Chapter 9 - Soil Notes

Chapter 10 - Respiration in Organisms Notes

Chapter 11 - Transportation in Animals and Plants Notes

Chapter 12 - Reproduction in Plants Notes

Chapter 13 - Motion and Time Notes

Chapter 14 - Electric Current and Its Effects Notes

Chapter 15 - Light Notes

Chapter 16 - Water: A Precious Resource Notes

Chapter 17 - Forests: Our Lifeline Notes

Chapter 18 - Wastewater Story Notes

CBSE Class 7 Science Chapter 1 Nutrition in Plants Revision Notes are thus one of the key study materials for the Class 7 Science exam. These notes cover detailed explanations for topics like Living and Non-living Organisms, Cells, Single and Multi-cellular organisms, Nutrition, Autotrophs and Heterotrophs, Photosynthesis, Organelles, Chloroplasts, Chlorophyll, Nutrients being replenished in the soil, Symbiotic Relationship, Nitrogen Fixation, Rhizobium, Parasites, Saprotrophs, Insectivorous Plants, etc. So students can download the CBSE Science Class 7 Nutrition in Plants Notes PDF for free from Vedantu and refer to them for their exam preparation.

FAQs on Nutrition in Plants Class 7 Notes CBSE Science Chapter 1 (Free PDF Download)

1. Why are Class 7th Science Chapter 1 Notes the Ideal Study Notes for Students?

These revision notes have been curated by experts after a deep and detailed study of the chapter. Students can rest assured of obtaining trusted guidance about this chapter through these revision notes that provide a well rounded and comprehensive summary of the chapter. Class 7 Science Chapter 1 notes ensure that the students cover all the topics covered under the chapter and it leads to thorough and excellent preparation for the exams. Students can access these revision notes at any time while preparing for their exams and tests.

2. How do Class 7 Science Ch 1 Notes Help the Student in Understanding the Chapter Well?

The revision notes have been prepared by experts in the field after a complete study of the chapter. They cover all the aspects of the topic nutrition in plants, with a detailed explanation of subtopics like the process of photosynthesis and the elements needed for it like chlorophyll and chloroplast. They also include a description of the types of organisms based on how they produce nutrients. Different types of plants and their nutrition are also explained in detail in the revision notes. Students will be able to do a wholesome revision of the chapter by simply going through the exhaustive revision notes.

3. What are the Benefits of Using These Revision Notes?

There are so many reasons why students must refer to the NCERT notes for Class 7 Science Chapter 1. These notes can be easily accessed online at any time by the students. When they are preparing for the exams, students like to go through the key points and summaries that will help them in tackling their exam question papers. The revision notes include a detailed explanation about each topic in a format that can easily be formulated into an answer.

4. What are the types of nutrition intake?

In terms of nutrition, there are two options: Autotrophic - Plants are main producers because of their autotrophic feeding. Nourishment is made by plants using light, carbon dioxide, and water to synthesize their food. A heterotroph is an animal or human who relies on plants for nourishment. Chemistry and chemicals essential for plants to develop as well as their supply from the outside is known as Plant Nutrition . A lack of this nutrient would cause the plant to die.

5. How do plants get their nutrition intake?

Photosynthesis, the process through which plants get their nutrition, happens in the leaves. A plant's leaves include veins that allow nutrients and hormones to flow throughout the leaf's cells. In photosynthesis the plants and other organisms transform light energy into chemical energy. This energy is then released to power the organism's activities through cellular respiration. It is an integral part of the plant’s life cycle and its survival depends on its efficient functioning.

6. Do plants feel pain?

Plants, unlike humans and other animals, lack nociceptors, which are receptors that are designed to respond to pain. They also don't have brains, therefore they don't have the gear to convert those impulses into genuine experiences. This is why plants lack the ability to experience pain. Plants, like all living things, desire to stay alive, and study has shown that when particular plants are cut, they make a scream-like sound. There are multiple theories regarding this.

7. What are the stages of photosynthesis?

The photosynthetic process in plants may be divided into four phases, each happening in a specific region of the chloroplast: (1) light absorption, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) ATP production, and (4) CO 2 conversion to carbohydrates (carbon fixation). This is a very crucial phenomenon and the plant’s survival depends on its efficient functioning. It also ensures the continuation of the plant’s vital role in nutrition production. To know more students can download the notes for this chapter free of cost from the  Vedantu website or mobile app.

8. What do you mean by chlorophyll?

The chemical that gives plants their green hue is chlorophyll. During the biological process known as photosynthesis, it aids plants in absorbing energy and obtaining nutrients from sunlight. Many green foods contain chlorophyll, and some individuals take it as a supplement or apply it topically. It is a very crucial component of green plants and forms the backbone of their nutrition intake and food processing. It is the guiding factor behind photosynthesis in plants.

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 Match the items given in Column I with those in Column II:

Farmers grow fruits and vegetables crops inside large green house because it protects it from high blowing wind, and rodents also green house protects the plant from the climatic conditions of outside and it can have its own suitable temperature for the growth of plants.

Farmers get advantages of the following things:

(i) They have control over their climatic conditions (Temperature, humidity etc.)

(ii)  Free from pests, rodents and also from birds and animals so they have increased producibility.

NCERT Solutions for Chapter 4 The Age of Industrialisation Class 10 History

Related chapters.

• Nutrition in Animals
• Fibre to Fabric
• Acids, Bases and Salts

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• Chapter 1: Nutrition In Plants

Nutrition in Plants Class 7 Science Notes - Chapter 1

Introduction to nutrition in plants, living and non-living organisms.

• Living organisms like human beings, plants and animals need food to survive and exist.
• Living organisms reproduce, respond to the environment and also adapt.
• Living organisms respire and excrete as well.

Cells are tiny units that help make up a living organism. Hence, they are also called building blocks of an organism.

• A cell is constituted of three major parts :
• A thin outer layer is called the cell membrane .
• A spherical structure located at the centre of the cell is called a nucleus .
• A jelly-like substance that surrounds a nucleus called the cytoplasm .

To know more about Cell, visit here .

Single and Multi-Cellular Organisms

• Organisms that are made up of just one cell are called single-celled or Unicellular organisms. E.g.  Amoeba
• Organisms with more than one cell in their body are called multicellular organisms.
• All human beings, plants and animals are multicellular organisms.

To know the difference between Unicellular and Muti-Cellular Organisms, visit here .

Nutrition is the mode of taking food by an organism and its utilisation by the body.

• Nutrition is very important as the nutrients from the food consumed enable living organisms to build their bodies and grow.
• Nutrition helps to repair damaged parts and organs.
• Nutrition also provides energy for carrying out various functions.

For more information on How Plants Get Their Nutrition, watch the below video

To know more about Nutrition, visit here .

Autotrophs and Heterotrophs

Organisms that make food themselves are called autotrophs .

• Plants are an example of autotrophs as they make their own food using carbon dioxide, water and light energy.

Organisms that rely on others and usually take in ready-made food made by the autotrophs are called   heterotrophs.

• Animals and human beings are an example of heterotrophs as they depend on plants in many ways for their food.

To know the difference between autotrophs and heterotrophs, visit here .

Photosynthesis

Photosynthesis  is the process of synthesis of food by green plants.

• This process usually takes place in the leaves of plants.
• The process requires chlorophyll (green-coloured pigment),  sunlight,   carbon dioxide and water. 

For more information on Photosynthesis, watch the below videos:

To know more about Photosynthesis, visit here .

• Organelles are tiny cellular structures inside a cell and perform specific functions that are important for the cell.
• They are found in the cytoplasm of a cell.
• E.g. Chloroplast is the cell organelle that carries out photosynthesis.

Chloroplasts

• The chloroplast is   a type of organelle that exists in plants.
• These organelles contain chlorophyll , the green-coloured pigment that is responsible for carrying out the process of photosynthesis in plants.

Chlorophyll

• Chlorophyll is the pigment that is responsible for the synthesis of food in green plants.
• This pigment green colour to its bearers and is abundantly found in leaves.
• Chlorophyll is locked inside the chloroplast.

Process of Photosynthesis

The process of photosynthesis takes place in the leaves, the “food factory” of the plants.

• Carbon dioxide is taken in through tiny pores on the leaves called stomata.
• Water and minerals that are required for the process are transported to the leaves from the roots through the stem.
• Chlorophyll helps the leaves use the energy from the sunlight to prepare food using carbon dioxide, water and minerals.
• Oxygen is released as a by-product of this process.
• The equation can be given as follows:

To know more about Photosynthesis Process, visit here .

Nutrients Being Replenished in Soil

• Plants absorb mineral nutrients from the soil in order to make their own food and for other important processes.
• Soils need to be enriched with nutrients such as nitrogen, phosphorus, potassium etc regularly.
• Only then can we grow plants and keep them healthy.
• There are 17 most important nutrients for plants.
• 6 are called macronutrients, and the rest are called micronutrients.
• Macronutrients are required in large quantities, while micronutrients are required in very small quantities.

To know more about Soil Fertility: Replenishment of Nutrients, visit here .

Other Modes of Nutrition

Symbiotic relationship.

Organisms that live together and share their shelter and nutrients are said to be in a symbiotic relationship.

• Certain fungi live in the roots of trees.
• The tree provides nutrients to the fungus and, in return, receives help from it to take up water and nutrients from the soil.
• This association works well for both the fungi and the tree.
• Another common example is Rhizobium bacteria .
• They reside in the root nodules of leguminous plants.
• The bacteria provide a plant with nitrogen that they fix, and in turn, they get shelter and food from the plant.
• Rhizobium is a type of bacteria that converts atmospheric nitrogen into a soluble form that can be utilised by plants (nitrogen fixation) .
• It usually resides in the roots of leguminous plants like peas, gram, moong etc., and is instrumental in providing these plants with a rich source of nitrogen.

To know more about Rhizobium, visit here .

Nitrogen Fixation

• Nitrogen is an important nutrient required for soil and for plants.
• However, nitrogen in the atmosphere is not easily accessible.

The process by which nitrogen is converted into a form that can be used by plants and other living organisms is called nitrogen fixation .

To know more about Nitrogen Fixation, visit here .

A  parasite is a heterotroph that completely depends on another organism for its food.

• The organism to which the parasite latches onto is called the host .
• The host, in the process, is deprived of all nutrients for its own growth as they are consumed by the parasite.
• For example, Cuscuta (Amarbel) is a nongreen plant that takes readymade food from the plant on which it is growing.

To know more about Parasites, visit here .

Saprotrophs

Organisms which rely on dead and decaying matter for their food are called Saprotrophs .

• This mode of nutrition is called saprotrophic nutrition .
• For example, Fungi.
• Fungi secrete digestive juices on the dead and decaying matter and convert it into a solution.
• Then they absorb the nutrients from it.

To know the difference between Parasites and Saprotrophs, visit here .

Insectivorous Plants

Plants that feed on insects are called Insectivorous plants.

• These plants are green and carry out photosynthesis.
• But, they grow in nitrogen-deficient soils.
• So, in order to get nitrogen, they feed on insects.
• These insectivorous plants have their parts modified for attracting and catching insects.
• For example, The pitcher plant, Venous flytrap

To know more about Insectivorous plants, visit here .

Did You Know?

Cactus plants.

• Most of the photosynthesis takes place in the leaves of green plants.
• However, in the case of some desert plants, it takes place in their stem and even branches.
• Cacti are found in the desert, and their leaves are modified to spines to avoid loss of water due to transpiration.
• Therefore, their green stems enable them to carry out the process of photosynthesis.

Frequently Asked Questions on CBSE Class 7 Science Notes Chapter 1 Nutrition in Plants

What are micronutrients.

Micronutrients are vitamins and minerals required by the plant in very small amounts.

What is nutrient density?

The nutrient density of a food is the ratio of beneficial ingredients to the food’s energy content for the amount that is commonly consumed.

What are macronutrients?

Macronutrients are vitamins and minerals required by the plant in large amounts.

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Class 7- Chapter 1 – Nutrition in Plants – 4 Worksheets with Answer Key

Table of Contents

Nutrition in Plants- Worksheets

These worksheets are related to the chapter on “Nutrition in Plants.” The chapter explores how plants obtain nutrients, focusing on autotrophic and heterotrophic nutrition. The provided worksheets include both solved and unsolved versions to aid in learning.

Key concepts covered in the chapter and explored through these worksheets include:

• Autotrophic Nutrition : Understanding how plants produce their own food through photosynthesis, using sunlight, carbon dioxide, and water.
• Heterotrophic Nutrition : Learning about plants that do not produce their own food and depend on other organisms, including parasitic and saprotrophic nutrition.
• Soil Nutrient Replenishment : Studying how nutrients are cycled back into the soil, including the role of nitrogen-fixing bacteria.

The solved worksheets offer solutions and approaches to these topics, while the unsolved worksheets provide opportunities for practice and self-assessment.

Also Check – Rapid Revision – Class 7 Science -Chapter 1- Nutrition in Plants – Complete Notes

Worksheet 1  – Nutrition in Plants – Student Worksheet (Unsolved)

Why do organisms take food?

Distinguish between a parasite and a saprotroph.

How would you test the presence of starch in leaves?

Give a brief description of the process of synthesis of food in green plants.

Show with the help of a sketch that plants are the ultimate source of food.

Fill in the blanks-

(a) Green plants are called _________________ since they synthesise their own food.

(b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis, solar energy is absorbed by the pigment called _________________.

(d) During photosynthesis, plants take in ______________________ and release __________________ gas.

Name the following-

(i) A parasitic plant with yellow, slender and branched stems.

(ii) A plant that is partially autotrophic.

(iii) The pores through which leaves exchange gases.

Tick the correct answer-

(a) Cuscuta is an example of-

(i) autotroph (ii) parasite (iii) saprotroph (iv) host

(b) The plant which traps and feeds on insects is-

(i) Cuscuta (ii) china rose (iii) pitcher plant (iv) rose

Match the items given in Column I with those in Column II-

Mark ‘T’ if the statement is true and ‘F’ if it is false-

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

(iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

Choose the correct option from the following-

Which part of the plant takes in carbon dioxide from the air for photosynthesis?

(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals

Plants take carbon dioxide from the atmosphere mainly through their-

(i) roots (ii) stem (iii) flowers (iv) leaves

Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?

Also Check – Chapter 1- Nutrition in Plants -Class 7 – Detailed Notes

Worksheet 1 – Nutrition in Plants – Solved Worksheet with Answer

• Organisms take food to obtain energy, essential nutrients, and organic materials needed for growth, development, and maintenance of their bodily functions.
• A parasite feeds on living organisms without killing them, often harming them, whereas a saprotroph feeds on dead and decaying organic matter, breaking it down.
• To test for starch in leaves, you can use the iodine test. First, boil the leaf to kill it, then immerse it in alcohol to remove chlorophyll, and finally, add iodine solution. If starch is present, the leaf will turn blue-black.
• Green plants synthesise food through photosynthesis. They use sunlight, carbon dioxide, and water to produce glucose and oxygen. This process occurs in the chloroplasts of the plant cells, primarily in the leaves.
• [Sketch of a plant with arrows showing sunlight, water, and CO2 entering, and O2 and glucose exiting, indicating the plant as a source of energy and food for other organisms.]

(a) autotrophs

(c) chlorophyll

(d) carbon dioxide; oxygen

(i) Cuscuta

(ii) Venus Flytrap

(iii) Stomata

(a) (ii) parasite

(b) (iii) pitcher plant

Chlorophyll – Sunlight absorption

Nitrogen – Heterotrophs

Cuscuta – Parasite

Animals – Leaf

Insects – Pitcher plant

(ii) Stomata

(iv) leaves

Farmers grow crops in greenhouses to provide a controlled environment that protects plants from extreme weather, pests, and diseases. Greenhouses allow for year-round cultivation, better growth conditions, and higher yield and quality.

Also Check – Nutrition in Plants – Class 7 Questions with Answers Worksheet

Worksheet 2 – Nutrition in Plants – Student Worksheet – Unsolved

Explain how plants obtain nitrogen and its significance in plant nutrition.

Describe the role of the sun in the process of photosynthesis.

What are the main differences between autotrophs and heterotrophs?

Explain the process by which leaves exchange gases.

Illustrate and label the parts of a plant involved in the process of photosynthesis.

Complete the following sentences-

(a) The process of taking in nutrients from dead and decaying matter is known as ________________.

(b) _________________ _ is a process where plants prepare food using water, carbon dioxide, and sunlight.

(c) The green pigment in plants that absorbs light energy is called _________________.

(d) Plants release oxygen and take in _________________ during the process of photosynthesis.

Identify the following-

(i) A plant that feeds on insects.

(ii) A non-green plant that absorbs food from other living organisms.

(iii) The gas released by plants during photosynthesis.

Select the correct option-

(a) The main function of the root in plants is to-

(i) Absorb sunlight (ii) Synthesize food (iii) Absorb water and minerals (iv) Release oxygen

(b) Which of these is not a part of photosynthesis?

(i) Sunlight (ii) Soil nutrients (iii) Carbon dioxide (iv) Water

Match the following-

True or False Statements-

(i) All green plants can prepare their own food. (T/F)

(ii) Water is not necessary for photosynthesis. (T/F)

(iii) Photosynthesis occurs in the roots of the plant. (T/F)

(iv) Nitrogen fixation is a part of the photosynthesis process. (T/F)

Choose the correct answer-

What is the primary function of chlorophyll in photosynthesis?

(i) Absorbing water (ii) Absorbing sunlight (iii) Releasing oxygen (iv) Absorbing carbon dioxide

Multiple-choice question-

Which of these elements is not directly involved in photosynthesis?

(i) Oxygen (ii) Carbon dioxide (iii) Nitrogen (iv) Sunlight

Explain the importance of photosynthesis in the ecosystem.

Also Check – NCERT Solutions for Class 7 Science Chapter 1: Nutrition In Plants

Worksheet 2 – Nutrition in Plants – Solved Worksheet with Answer

Plants obtain nitrogen primarily from the soil in the form of nitrate or ammonium ions. Nitrogen is crucial for plant nutrition as it is a key component of amino acids, proteins, nucleic acids, and chlorophyll. Some plants, like legumes, have a symbiotic relationship with nitrogen-fixing bacteria to convert atmospheric nitrogen into a usable form.

The sun plays a critical role in photosynthesis by providing the energy needed to drive the chemical reactions. Sunlight is absorbed by chlorophyll, which then converts carbon dioxide and water into glucose and oxygen, releasing energy.

Autotrophs can synthesise their own food from inorganic substances, using light or chemical energy, while heterotrophs cannot synthesise their food and rely on other organisms for their nutrition.

Leaves exchange gases through tiny openings called stomata. Oxygen and water vapour are released from the stomata, and carbon dioxide enters for use in photosynthesis. This gas exchange is essential for photosynthesis and respiration.

[An illustration showing a plant with labelled parts such as leaves, stomata, roots, and chloroplasts in the cells where photosynthesis takes place.]

(a) saprotrophic nutrition

(b) Photosynthesis

(d) carbon dioxide

(i) Venus Flytrap or Pitcher Plant

(ii) Cuscuta (Dodder)

(iii) Oxygen

(a) (iii) Absorb water and minerals

(b) (ii) Soil nutrients

• Root – Absorbs water and minerals
• Leaf – Produces food
• Sunlight – Necessary for growth
• Carbon dioxide – Photosynthesis

(ii) Absorbing sunlight

(iii) Nitrogen

Photosynthesis is vital for the ecosystem as it is the primary process that converts solar energy into chemical energy, producing oxygen and organic compounds. This process sustains the life of plants and organisms that feed on plants, forming the basis of most food chains. It also plays a crucial role in regulating the atmosphere’s oxygen and carbon dioxide levels, supporting diverse life forms on Earth.

Worksheet 3 – Nutrition in Plants – Student Worksheet – Unsolved

Explain the process and significance of photosynthesis in plants.

Describe the different modes of nutrition in plants and give examples of each.

What are parasitic plants? Give an example and explain how they obtain food.

Discuss the concept of insectivorous plants. Why do these plants consume insects?

Explain the process by which green plants prepare food using carbon dioxide and water.

(a) The raw materials for photosynthesis are _________________ and _________________.

(b) The main product of photosynthesis is _________________.

(c) Plants that do not have chlorophyll obtain food through _________________ nutrition.

(d) The association of Rhizobium bacteria with leguminous plants is an example of _________________.

(i) A green plant that traps and digests insects.

(ii) A non-green plant that derives food from a host plant.

(iii) Bacteria that convert atmospheric nitrogen into usable forms for plants.

(a) Which part of the plant is primarily involved in photosynthesis?

(i) Roots (ii) Stems (iii) Leaves (iv) Flowers

(b) The process by which plants release oxygen is-

(i) Respiration (ii) Transpiration (iii) Photosynthesis (iv) Nutrition

(i) All plants are autotrophs. (T/F)

(ii) Chlorophyll is necessary for photosynthesis. (T/F)

(iii) Insectivorous plants are entirely heterotrophic. (T/F)

(iv) Saprotrophic nutrition involves the consumption of living organisms. (T/F)

Which of the following is not a product of photosynthesis?

(i) Oxygen (ii) Carbon dioxide (iii) Glucose (iv) Water

In which part of a plant does nitrogen fixation primarily occur?

(i) Leaves (ii) Stems (iii) Roots (iv) Flowers

Discuss the importance of nitrogen in plant nutrition and how plants acquire it? 

Worksheet 3 – Nutrition in Plants – Solved Worksheet with Answer

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is significant because it produces the oxygen we breathe and provides energy in the form of glucose for the plants themselves and ultimately for other organisms that consume plants.

• Autotrophic nutrition- Plants like grass that synthesise their own food using sunlight, water, and carbon dioxide.
• Heterotrophic nutrition- Plants like Venus Flytrap that depend on other organisms for food.
• Saprotrophic nutrition- Fungi that absorb nutrients from dead and decaying matter.
• Parasitic nutrition- Plants like Cuscuta that derive nutrients from living host plants.

Parasitic plants, like Cuscuta, obtain nutrients by attaching to and absorbing resources from a host plant. They lack chlorophyll and depend entirely on their host for survival.

Insectivorous plants, such as the Venus Flytrap, consume insects to supplement their nutritional requirements, particularly in nitrogen-poor environments. They trap and digest insects to obtain essential nutrients like nitrogen.

Green plants prepare food through photosynthesis, where they absorb carbon dioxide from the air and water from the soil. With sunlight energy captured by chlorophyll, they convert these into glucose and release oxygen as a by-product.

(a) carbon dioxide and water

(b) glucose

(c) heterotrophic

(d) symbiotic

(i) Venus Flytrap

(ii) Dodder plant (Cuscuta)

(iii) Rhizobium bacteria

(a) (iii) Leaves

(b) (iii) Photosynthesis

• Autotrophs – Produces own food
• Heterotrophs – Depends on others for food
• Photosynthesis – Sunlight to chemical energy
• Saprotrophs – Feeds on dead and decaying matter

(ii) Carbon dioxide

(iii) Roots

Discuss the importance of nitrogen in plant nutrition and how plants acquire it.

Nitrogen is essential in plant nutrition as it is a key component of amino acids, proteins, and chlorophyll. Plants acquire nitrogen primarily through their roots in the form of nitrate and ammonium ions from the soil. Some plants engage in symbiotic relationships with nitrogen-fixing bacteria to convert atmospheric nitrogen into forms usable by plants.

Worksheet 4 – Nutrition in Plants – Student Worksheet – Unsolved

Explain the process of photosynthesis and its significance.

Differentiate between autotrophic and heterotrophic nutrition in plants.

Describe how plants absorb water and minerals from the soil.

What is the role of chlorophyll in photosynthesis?

Illustrate how the transportation of water and minerals occurs in plants.

(a) Leaves are known as the _________________ of the plant.

(b) The tiny pores on the surface of leaves are called _________________.

(c) During photosynthesis, plants convert sunlight into _________________ energy.

(d) The process of photosynthesis occurs in the _________________ of the leaves.

(i) A green pigment essential for photosynthesis.

(ii) The part of the plant where photosynthesis primarily occurs.

(iii) A type of plant that can perform photosynthesis in its green stems.

(a) The primary products of photosynthesis are-

(i) Oxygen and carbohydrates (ii) Carbon dioxide and water (iii) Nitrogen and glucose (iv) Water and minerals

(b) Which part of the plant cell is responsible for photosynthesis?

(i) Nucleus (ii) Mitochondria (iii) Chloroplast (iv) Cell membrane

(i) Only the leaves of a plant can perform photosynthesis. (T/F)

(ii) Photosynthesis can occur without sunlight. (T/F)

(iii) All plants are capable of photosynthesis. (T/F)

(iv) Photosynthesis is essential for oxygen production on Earth. (T/F)

Which of the following is not involved in the process of photosynthesis?

(i) Sunlight (ii) Chlorophyll (iii) Soil nutrients (iv) Carbon dioxide

What is the importance of nitrogen for plants?

(i) It aids in photosynthesis (ii) It helps in protein synthesis (iii) It provides energy (iv) It is a source of chlorophyll

Explain how plants that do not have chlorophyll obtain their nutrition.

Worksheet 4 – Nutrition in Plants – Solved Worksheet with Answer

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is vital as it provides the basic energy source for almost all organisms and is responsible for the production of oxygen, which is essential for most life forms on Earth.

Autotrophic nutrition involves plants producing their own food using sunlight, carbon dioxide, and water (like most green plants). Heterotrophic nutrition involves plants obtaining food from other sources because they cannot produce it themselves (like fungi or parasitic plants).

Plants absorb water and minerals from the soil through their roots. The root hairs increase the surface area, enhancing the absorption. Water and dissolved minerals are then transported upwards through the plant’s vascular system, particularly the xylem.

Chlorophyll is a green pigment in the leaves that absorbs sunlight, providing the energy necessary for photosynthesis to convert carbon dioxide and water into glucose and oxygen.

[An illustration would show roots absorbing water and minerals, which then travel up through the xylem to the leaves and other parts of the plant.]

(a) food factory

(b) stomata

(c) chemical

(d) chloroplasts

(i) Chlorophyll

(ii) Leaves

(iii) Cactus

(a) (i) Oxygen and carbohydrates

(b) (iii) Chloroplast

Photosynthesis – Oxygen production

Stomata – Carbon dioxide intake

Roots – Water and mineral absorption

(iii) Soil nutrients

Multiple-choice question –

(ii) It helps in protein synthesis

Plants without chlorophyll, such as fungi or parasitic plants, obtain their nutrition heterotrophically. They either decompose and absorb nutrients from dead organic matter (saprotrophic nutrition) or absorb nutrients from living host plants (parasitic nutrition).

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Nutrition in Plants CBSE Class 7 Science Revision Notes Chapter 1

Quick revision.

Living organisms such as plants and animals survive on food.

The food gives them the energy to perform several activities in their life and helps in the growth.

Nutrients - Certain substances are present in the foods that help in the survival of the organisms. These special substances are called nutrients for example, proteins, vitamins, carbohydrates, minerals and fats.

Some living organisms like plants synthesize their food by themselves by themselves while others such as animals depend upon the plants and other animals for their food.

Figure 1: Different Nutrients

Mode of Nutrition in Plants

What is nutrition?

Nutrition can be defined as a process by which organisms take in the food and utilize it in order to survive. Based on the mode of nutrition organisms can be divided into two categories:

Autotrophic Organisms - They can prepare their food by themselves such as plants

Heterotrophic Organisms - They depend upon other organisms for their food such as animals

How do plants prepare their food?

Plants prepare their food with the help of certain raw materials that they gather from their surroundings:

carbon dioxide

chlorophyll

The process by which plants prepare their food by using these raw materials is called Photosynthesis .

Figure 2: Photosynthesis

Where is the food made in plants?

Leaves are also known as the Food Factories of the plants as they are the places where food is prepared.

Different parts of the plants like roots gather the raw materials from the environment and then transfer them to the leaves where photosynthesis takes place.

Transportation of water and Minerals in plants - The roots of the plants absorbs the water and minerals of the soil and then transports them to the leaves via stems and branches.

Figure 3: Transportation of water and Minerals in plants

Inhalation of Carbon Dioxide - There are tiny holes or pores present on the surface of the leaves called Stomata that take in the carbon dioxide present in the atmosphere.

Figure 4: Stomata on leaves and the Chlorophyll

Presences of Chlorophyll in the Leaves - A substance called Chlorophyll is present in the leaves of the plants. It is a green colour pigment. The chlorophyll not only provides green colour to the leaves but also helps in the process of photosynthesis. Chlorophyll captures the sunlight and along with other raw materials prepares the food in the leaves.

This process of photosynthesis only occurs in the daytime in the presence of Sunlight hence it is called Photosynthesis , photo means light.

Why sun is called the ultimate source of energy for all living organisms?

We know that the plants use solar energy to make their food. The herbivores animals depend upon the plants for their food. Animals (carnivores) that do not eat plants depend upon the herbivores animals. Therefore, all of the living organisms directly or indirectly receive their energy from the Sun.

Cells in Living Organisms

All living organisms are made up of tiny structures called cells. Some organisms (microscopic) contains only one cell while others plants and animals contain many cells of different kinds. Parts of a cell:

The Nucleus - Every cell has a nucleus present in the centre that performs various functions of the cell.

The Cell Membrane - Every cell has an outer boundary which protects the cell called the Cell Membrane .

The cytoplasm - Every cell has a gel-like structure present in it called the Cytoplasm .

Cell organelles: These are membrane bound structures found within a cell in the cytoplasm. The cell organelles have special function associated with them. Different cell organelles found in the cell are:

Mitochondria – Produces energy for the cell

Endoplasmic Reticulum – Produces lipids and proteins in cell

Golgi apparatus – Helps in exporting materials out of cell

Lysosomes – Help in digestion in the cell

Figure 5: Structure of Cell in Animals and Plants

Can photosynthesis take place in other parts of the plant?

Yes, green stems and branches of the plants can also undergo the process of photosynthesis. For example, plants in the desert area like cactus do not have leaves but they still exist there because their stem produces the food for the plant.

Why is the process of photosynthesis important?

There will be no food if the plants would stop conducting the photosynthesis process.

The plants take in carbon dioxide and produce oxygen during the process of photosynthesis. Hence, without this process, it would not be possible to survive on earth as they would be no oxygen.

Production of Oxygen and Carbohydrates by the Plants

Figure 6: Production of Oxygen and Carbohydrates

Plants use carbon dioxide and water in presence of the sunlight and chlorophyll to produce carbohydrates and oxygen. The carbohydrates thus produced by the plants are converted into starch.

Chloroplast and the Process of Photosynthesis

Figure 7:  Structure of Chloroplast

Chloroplasts are special cell organelles that are found only in plant cells. They are called the food producers of the plant cells.

The chloroplasts are surrounded by two membranes called the Inner and Outer Membrane . The inner membrane surrounds stroma and thylakoid stacks.

The chlorophyll molecules are present on each of the thylakoids. The chloroplasts convert the sunlight into sugars that are used by the plant cells.

Hence, chloroplasts allow the conduction of the process of photosynthesis. The chlorophyll that can absorb the sunlight is present inside the chloroplasts.

When the light of the sun hits the chloroplasts and the chlorophyll, the light energy is converted into chemical energy found in compounds such as ATP and NADPH.

Then these energy molecules move into the stroma where carbon dioxide is attached to them. As a result of the molecular reactions, oxygen and glucose are created.

Can leaves which are red or Brown or violet in colour conduct photosynthesis?

Yes, the chlorophyll is also present in leaves that are not green in color. They are of different colours because the other colour pigments are more than the green colour pigments in such leaves.

Algae contain chlorophyll

Algae are green coloured organisms found in the stagnant water. They get their green color from chlorophyll. Since they have chlorophyll in them they are capable of conducting photosynthesis. (olympiads)

Figure 7: Algae in Water

How do plants generate proteins and fats?

Along with carbohydrates, plants can also produce proteins and fats which are formed with the help of Nitrogen.

Nitrogen is present in large amounts in the air but plants cannot consume the nitrogen directly from the atmosphere. 

The soil often contains some bacteria that are capable of converting the nitrogen into nitrates which can be the used by the plants.

Also, fertilizers used by farmers and gardeners contain a high amount of Nitrogen which mixes into the soil and is used by the plants.

Nutrition in Plants that do not contain Chlorophyll

Many plants do not contain any chlorophyll. Hence they are unable to prepare their food by themselves. Therefore, they rely on other plants and animals for their food.

1. Parasitic Plants - Some plants live on another plant for their nutrition. These are called parasites. The plants on which these parasitic plants survive are called the host. For Example, cuscuta is a parasitic plant.

Figure 8: Yellow color Cuscuta plant growing over green plants

2. Insectivorous Plants - Some plants depend upon insects for the food and thus are called Insectivorous . The leaves of these plants are modified into a pitcher like structure. The top part of the leaves acts as a lid which can open and close the pitcher. The pitcher contains hair in a downward direction which traps the insects. The pitcher on capturing the insect secretes some digestive juices which help in the digestion of the insect. For Example, Dischidia and Nepenthes

Figure 9: Insectivorous Plants

3. Saprotrophs - Some organisms survive on decaying food and organisms. This mode of nutrition is called saprotrophic nutrition and the organisms that survive because of the saprotrophic nutrition are called Saprophytes .

How do saprophytes obtain their nutrition ?

The saprophytes secrete digestive juices on the decaying and dead matter.

These juices convert the matter into a solution.

The saprophytes that absorb the nutrients from the solution.

For Example, Fungi (yeast and mushrooms) are a saprophytes that can be found on stale food and pickles which are exposed to the hot and humid environment.

Figure 10: Fungi growing on Bread

4 .  Symbiotic Relationship - Sometimes organisms live together to share shelter and food with each other. These are said to have a symbiotic relationship.

Examples of organisms living in a symbiotic relationship:

Some fungi live in the roots of the trees. These fungi take food from the trees and in return help the trees in absorbing water and nutrients from the soil.

Sometimes an organism that contains chlorophyll such as algae lives in association with a fungus (together called as Lichens ). The algae provide food and nutrition to the fungus while the fungus provides water, minerals and shelter to the algae.

Figure 11: Lichens

Replenishing the Soil with Nutrients

Plants get their nutrients from the soil mainly hence there is a need to replenish the soil again with nutrients so that the plants can survive on it.

Fertilizers and manure are often used to replenish the soil with the nutrients. They contain potassium, phosphorus and nitrogen all of which are important for the plants.

A bacterium called Rhizobium is present in the soil which can convert nitrogen present in it in the form that can be consumed by the plants.

The rhizobium generally lives in the roots of the plants such as peas, beans, grams and legumes and provides nitrogen to these plants. This again is an example of a symbiotic relationship. The farmers often do not need to use fertilizers while growing such crops. (Olympiads)

Figure 12: Rhizobium Bacteria in Soil

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Extra Questions for Class 7 Science Chapter 1 Nutrition in Plants

Extra questions for Class 7 Science Chapter 1 Nutrition in Plants with answers is given below. Our subject expert prepared these solutions as per the latest NCERT textbook. These questions will be helpful to revise the all topics and concepts. CBSE Class 7 extra questions are the most simple and conceptual questions that are prepared by subject experts for the students to study well for the final exams. By solving these extra questions, students can be very efficient in their exam preparations.

Nutrition in Plants Class 7 Science Extra Questions and Answers

Very short extra questions and answer.

1. Define parasites.

Answer: Parasites they are those organisms which grow on other plants or animals for their food, e.g. Cuscuta.

2. Name the bacteria that can fix atmospheric nitrogen.

Answer: Rhizobium is the bacterium which can fix atmospheric nitrogen.

3. Name a parasitic plant with yellow, slender and tubular stem.

Answer: Cuscuta

4. Give one example of parasite.

Answer: Amarbel

5. Name one plant that traps and feeds on insects.

Answer: Pitcher Plant

6. Name a plant that has both autotrophic and heterotrophic mode of nutrition.

Answer: Insectivorous Plant

7. What are fluffy umbrella-like patches growing on rotting wood during the rainy season called?

Answer: These organisms are called fungi.

8. How can cells be seen?

Answer: Most type of cells can be seen only under the microscope.

9. Where is nucleus located in a cell?

Answer: In most of the cell, nucleus is centrally located.

10. What are carbohydrates made up of?

Answer:  The carbohydrates are made of carbon, hydrogen and oxygen.

11. From where do plants get raw materials to prepare their food?

Answer:  Plants get raw materials to prepare their food from their surroundings.

12. Where does the synthesis of food in a plant usually take place?

Answer: The synthesis of food in plants occurs in leaves.

 13. What is the ultimate source of energy for all living organisms?

Answer: Sun is the ultimate source of energy for all living organisms.

14. Why do some plants feed on insects? Answer: Insectivorous plants grow in soil which lack nitrogen, therefore they eat insects to fulfill their need of nitrogen.

15. What are the components of food?

Answer: Carbohydrates, proteins, fats, vitamins and minerals are components of food.

Short Extra Questions and Answers

1. What are insectivorous plants?

Answer: Insect-eating plants such as pitcher plant are called insectivorous plants.

2. What do you mean by nutrition?

Answer: Nutrition is the mode of taking food by an organism and its utilization by the body.

3. Why photosynthesis is named so?

Answer: Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis (Photo: light; synthesis: to combine).

4. What are heterotrophs?

Answer: Animals and most other organisms take in ready-made food prepared by the plants. They are called heterotrophs (heteros = other).

5. What are stomata?

Answer: Tiny pores are present on the surface of the leaves which helps in exchange of gases. Such pores are called stomata.

6. What are called autotrophs?

Answer: Organisms able to make food themselves from simple substances are called autotrophs.

7. What is heterotrophic nutrition?

Answer: Heterotrophic nutrition is the mode of nutrition in which organisms depend upon other organisms to survive.

8. What are nutrients?

Answer: Carbohydrates, proteins, fats, vitamins and minerals are components of food. These components of food are called nutrients.

9. What is chlorophyll?

Answer: A green pigment present in all green plants which helps leaves to capture the energy of the sunlight is called chlorophyll.

10. Where and in what conditions do fungi grow?

Answer: Fungi grow on pickles, leather, clothes and other articles that are left in hot and humid weather for long time.

11. How do fungi grow and develop?

Answer: The fungal spores are generally present in the air. When they land on wet and warm things they germinate and grow.

12. Why algae are green in colour?

Answer: They contain chlorophyll which gives them the green colour. Algae can also prepare their own food by photosynthesis.

13. What are the raw materials required for photosynthesis?

Answer: Chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis.

14. Do insectivorous plants perform photosynthesis?

Answer: Insectivorous plants got leaves therefore they can photosynthesis, which means they can prepare their food in the presence of sunlight.

15. What are algae?

Answer: We often see slimy, green patches in ponds or in other stagnant water bodies. These are generally formed by the growth of organisms called algae.

16. Why do organisms need to take food?

Answer: The food enables living organisms to build their bodies, to grow, to repair damaged parts of their bodies and provide the energy to carry out life processes.

17. Why plants such as pitcher plant do not get all the required nutrients from the soil in which they grow?

Answer: Plants such as pitcher plant do not get all the required nutrients from the soil in which they grow because they are deficient in nutrients such as nitrogen.

18. What is Cuscuta?

Answer:  Cuscuta is a parasitic plant. It is yellow tubular structures twining around the stem and branches. It does not have chlorophyll. It takes readymade food from the plant on which it is climbing.

19. What is the role of rhizobium bacteria in leguminous plant?

Answer: The bacterium called Rhizobium present in leguminous plant can take atmospheric nitrogen and convert it into a soluble form. Thus help in nitrogen fixation.

20. Some plants have deep red, violet or brown leaves. Do these leaves also carry out photosynthesis?

Answer: The leaves other than green also have chlorophyll. The large amount of red, brown and other pigments mask the green colour. Photosynthesis takes place in these leaves also.

21. What is so special about the leaves that they can synthesis food but other parts of the plant cannot?

Answer: The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesis (prepare) food from carbon dioxide and water.

Long Extra Questions and Answers

1. How would you test the presence of starch in leaves?

Answer: Iodine solution is used to test leaves for the presence of starch.

Test – Remove chlorophyll by boiling it in alcohol and then add 2 drops of iodine solution. If the color changes to blue, indicates the presence of starch in the leaves.

2. How do plants obtain the raw materials from the surroundings?

Answer: Water and minerals present in the soil are absorbed by the roots. Carbon dioxide from air is taken in through the tiny pores present on the surface of the leaves. The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight.

3. Explain the mode of nutrition in fungi.

Answer:  They secrete digestive juices on the dead and decaying matter and convert it into a solution. Then they absorb the nutrients from it. This mode of nutrition in which organisms take in nutrients in solution form from dead and decaying matter is called saprotrophic nutrition.

4. If the pitcher plant is green and carries out photosynthesis, then why does it feed on insects?

Answer: These plants grow in soil that is deficient in nitrogen. All living things must have nitrogen. These plants (e.g. pitcher plant) are green and carry out photosynthesis to obtain a part of the food required by them. So, they feed on insects to obtain the nitrogen needed for their growth.

5. How farmer is benefited from symbiotic relationship between rhizobium bacteria and legumes?

Answer:  This association is of great significance for the farmers. The bacterium called Rhizobium present in leguminous plant can take atmospheric nitrogen and convert it into a soluble form. So, they do not need to add nitrogen fertiliser to the soil in which leguminous plants are grown.

6. How do plants transport raw materials to the food factories of the plants?

Answer:  Water and minerals are transported to the leaves by the vessels which run like pipes throughout the root, the stem, the branches and the leaves. They form a continuous path or passage for the nutrients to reach the leaf. The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight.

7. From where do the plants obtain nitrogen?

Answer: Nitrogen is present in abundance in gaseous form in the air.

However, plants cannot absorb nitrogen in this form. Soil has certain bacteria that convert gaseous nitrogen into a usable form and release it into the soil. These soluble forms are absorbed by the plants along with water. Farmers add fertilisers rich in nitrogen to the soil.

8. Can we say that the insectivorous plants are partial heterotrophs?

Answer: These plants grow in soil that is deficient in nitrogen. All living things must have nitrogen. These plants are green and carry out photosynthesis to obtain a part of the food required by them. They feed on insects to obtain the nitrogen needed for their growth. So, we can say that the insectivorous plants are partial heterotrophs.

9. Explain symbiotic relationship in rhizobium and leguminous plants.

Answer:  The bacterium called Rhizobium can take atmospheric nitrogen and convert it into a soluble form. But Rhizobium cannot make its own food. So it lives in the roots of gram, peas, moong, beans and other legumes and provides them with nitrogen. In return, the plants provide food and shelter to the bacteria. They, thus, have a symbiotic relationship.

10. Give a brief description of the process of synthesis of food in green plants?

Answer: The synthesis of food in plants occurs in leaves. Therefore, all the raw materials must reach there. Water and minerals present in the soil are absorbed by the roots and transported to the leaves. Carbon dioxide from air is taken in through stomata present on the surface of the leaves. Chlorophyll helps leaves to capture the energy of the sunlight. This energy is used to synthesis (prepare) food from carbon dioxide and water.

11. Explain symbiotic relationship with the help of example.

Answer:  Some organisms live together and share shelter and nutrients. This is called symbiotic relationship. For example, in organisms called lichens, a chlorophyll-containing partner, which is an alga, and a fungus live together. The fungus provides shelter, water and minerals to the alga and, in return, the alga provides food which it prepares by photosynthesis.

12. Define cells, cell membrane, nucleus and cytoplasm.

Answer:  Cells – the bodies of living organisms are made of tiny units called cells.

Cell membrane – The cell is enclosed by a thin outer boundary, called the cell membrane.

Nucleus – Most cells have a distinct, centrally located spherical structure called the nucleus.

Cytoplasm – The nucleus is surrounded by a jelly-like substance called cytoplasm.

13. Distinguish between a parasite and a saprotroph.

14. Can we imagine life on earth in the absence of photosynthesis?

Answer: No, we cannot imagine life on earth in the absence of photosynthesis. In the absence of photosynthesis there would not be any food. The survival of almost all living organisms directly or indirectly depends upon the food made by the plants. Besides, oxygen which is essential for the survival of all living organisms is produced during photosynthesis. In the absence of photosynthesis, life would be impossible on the earth.

15. Write a note on pitcher plant?

Answer: The pitcher-like structure is the modified part of the leaf. The apex of the leaf forms a lid which can open and close the mouth of the pitcher. Inside the pitcher there are hair which are directed downwards. When an insect lands in the pitcher, the lid closes and the trapped insect gets entangled into the hair. The insect is digested by the digestive juices secreted in the pitcher.

16. How nutrients are replenished in the soil?

Answer:  Plants absorb mineral nutrients from the soil. So, their amounts in the soil keep on declining. Fertilisers and manures contain plant nutrients such as nitrogen, potassium, phosphorous, etc. These nutrients need to be added from time to time to enrich the soil. The bacterium called Rhizobium present in the roots of legumes plants can take atmospheric nitrogen and convert it into a soluble form. This way Rhizobium bacterium also helps to replenish nitrogen in the soil.

17. Draw a diagram showing photosynthesis. Answer: