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NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants
Edited By Irshad Anwar | Updated on Apr 21, 2025 09:54 AM IST
NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants provides a comprehensive understanding of how plants prepare their food through photosynthesis and other modes of nutrition. The question and answer section helps students clarify concepts such as autotrophic and heterotrophic nutrition. By practising the questions of Nutrition in Plants, students can improve their conceptual knowledge and enhance their exam preparation. The answers explain the fundamental processes that sustain plant life in a simplified manner. The chapter solutions in PDF format also allow students to revise the key points easily. For finding solutions to any other class questions, NCERT Solutions will help you out.
This Story also Contains
- Download PDF of NCERT Solutions for Class 7 Science Chapter 1 – Nutrition in Plants
- NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants: Solved Exercise Questions:
- Important topics of Class 7 Science Chapter 1 – Nutrition in Plants
- How do you solve NCERT Class 7 Science Chapter 1 questions effectively?
- NCERT Solutions for Class 7 Science Chapter-Wise
- Practice Questions for Class 7 Science Nutrition in Plants
For a quick revision, the Nutrition in Plants Class 7 questions and answers section helps students read the chapter efficiently. The NCERT Solutions for Class 7 are written in simple language to improve concept clarity. Additionally, students can download the solutions in PDF format to study in their comfort. Since these solutions are similar to the latest CBSE syllabus, they prove a reliable resource for students aiming to score high in exams.
Download PDF of NCERT Solutions for Class 7 Science Chapter 1 – Nutrition in Plants
Students can download the PDF of Chapter 1 from the below link:-
NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants: Solved Exercise Questions:
The solved exercise questions are given below-
Q1. Why do organisms take food?
Answer:
Organisms take food to:
(i) Get the energy to carry out life processes.
(ii) Build their bodies.
(iii) To grow.
(iv) Repair damaged parts of their bodies.
Q2. Distinguish between a parasite and a saprotroph.
Answer:
Difference between Parasites and Saprotrophs:
| Parasites | Saprotrophs |
| A parasite derives its nutrients from the living organism and it deprives the host of valuable nutrients. For example, Mosquito. | Saprotroph organisms take in nutrients from dead and decaying matter. For example, Fungi. |
Q3. How would you test the presence of starch in leaves?
Answer:
To test the presence of starch in leaves: Perform an 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 colour with the starch.
Hence we can test the presence of starch in the leaves.
Q4. Give a brief description of the process of synthesis of food in green plants.
Answer:
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 is as follows:
Q5. Show with the help of a sketch that plants are the ultimate source of food.
Answer:
Following is the Food chain diagram to show that plant is the ultimate source of food:
(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.
Answer:
(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.
(i) A parasitic plant with yellow, slender and branched stem.
Answer:
Cuscuta (Amarbel) is a parasitic plant with yellow, slender and branched stem.
Q7. Name the following:
(ii) A plant that is partially autotrophic.
Answer:
The pitcher plant is a partially autotrophic plant.
Pitcher plant is an insectivorous plants and insectivorous plants are not complete autotrophs but are partially autotrophs.
Q7. Name the following:
(iii) The pores through which leaves exchange gases.
Answer:
Stomata pores are responsible for which leaves exchange gases.
Cuscuta is an example of : (i) autotroph (ii) parasite (iii) saprotroph (iv) host
Answer:
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
Answer:
The plant which traps and feeds on insects is:
(iv) pitcher plant
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
Answer:
Match the columns:
| Column I | Matched Column II |
| Chlorophyll | Leaf |
| Nitrogen | Rhizobium |
| Cuscuta | Parasite |
| Animals | Heterotrophs |
| Insects | Pitcher plant |
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)
Answer:
(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.
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
Answer:
(ii) Stomata take in carbon dioxide from the 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
Answer:
(iv) Leaves take carbon dioxide from the atmosphere.
Answer:
Farmers grow fruits and vegetable crops inside large greenhouses because it protects them from high-blowing wind, and rodents also greenhouse protects the plant from the climatic conditions 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 reproducibility.
NCERT Solutions for Class 7: Subject Wise
Important topics of Class 7 Science Chapter 1 – Nutrition in Plants
The important topics of the chapter are given below-
1. Nutrition in Plants
Plants need nutrients to grow and survive. They prepare their own food using sunlight, water, carbon dioxide and chlorophyll. This process is known as photosynthesis. However, they also depend on other sources for nutrition.
1.1. Mode of Nutrition in Plants
Plants show two main modes of nutrition: autotrophic and heterotrophic. Most plants are autotrophs; they make their own food by the process of photosynthesis. Some plants, like parasites and saprotrophs, use heterotrophic nutrition, where they obtain food from other resources.
1.2. Photosynthesis — Food making in Plants
Photosynthesis is a process in green plants where they make their own food by using sunlight, chlorophyll, carbon dioxide and water. The chlorophyll in these plants helps capture sunlight for the process. This process releases oxygen and produces glucose, which is used for plant growth and energy.
1.3. Other Modes of Nutrition in Plants
Some plants that don't have chlorophyll can't make their own food. They depend on other plants, decaying matter, or insects for nutrition. Examples- parasitic plants (Cuscutta), insectivorous plants (pitcher plants, Venus flytrap), and saprophytic plants (mushroom).
1.4. Saprotrophs
Saprotrophs are plants that depend on dead and decaying matter for their food. They release digestive enzymes to break down complex substances into simpler ones, which they absorb. Examples- fungi, mushrooms, and some bacteria. They play an important role in decomposing organic matter.
1.5. How Nutrients are replenished in the Soil?
Plants absorb nutrients from the soil, which must be replenished back to maintain soil fertility. This happens with the help of natural processes like the decomposition of dead plants and animals. Farmers also add fertilisers to enrich the soil with essential nutrients like nitrogen, phosphorous and potassium.
How do you solve NCERT Class 7 Science Chapter 1 questions effectively?
The students should begin by understanding the key concepts like mode of nutrition, photosynthesis and nutrient replenishment in the soil. They should make clear notes of important terms like autotrophic nutrition, chlorophyll and stomata. Important diagrams of the processes of photosynthesis should also be practised for better visual memory. They should go through the NCERT as well as exemplar questions thoroughly and try answering them. Examples and simple definitions will make sure clarity and accuracy are achieved.
NCERT Solutions for Class 7 Science Chapter-Wise
The chapterwise solutions are given below:
Practice Questions for Class 7 Science Nutrition in Plants
Below are a few solved practice questions:
Q1. What is autotrophic nutrition?
Answer:
Autotrophic nutrition is a mode of nutrition in which organisms prepare their own food, using sunlight, carbon dioxide, chlorophyll, and water. Green plants follow this mode through the process known as photosynthesis.
Q2. Name the raw materials required for photosynthesis.
Answer:
The raw materials needed are carbon dioxide, water and sunlight. Chlorophyll present in the leaves helps trap sunlight for this process.
Q3. Why are leaves called the food factories of the plants?
Answer:
Leaves have chlorophyll which helps in capturing the sunlight to carry out photosynthesis. Hence, they are the main site for food production in plants.
Q4. Define parasitic nutrition with an example.
Answer:
Parasitic nutrition is the mode of nutrition in which the organism gets its nutrients from another living organism (the host). For example, Cuscutta grows on other plants.
Q5. How do leguminous plants help in replenishing soil fertility?
Answer:
Leguminous plants have root nodules, which have nitrogen-fixing bacteria such as Rhizobium. These bacteria help in converting atmospheric nitrogen into the soil.
Q6. What is the importance of sunlight in photosynthesis?
Answer:
Sunlight provides the energy needed for the chemical reactions of photosynthesis, without which plants cannot make their own food.
The NCERT Solutions for Class 7 Science covers all the chapters in an easy-to-understand format. Chapter 1 Science Class 7 NCERT covers essential topics such as photosynthesis, types of plant nutrition and the role of different nutrients. Topics such as parasitic, saprophytic and symbiotic nutrition are also tested in the question-answer section of the chapter. The answers provide step-by-step explanations for better comprehension. Practising the questions offers a structured learning approach and ensures the students have a solid understanding of the topic for exams and practical applications.
Also Check NCERT Books and NCERT Syllabus here:
We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.
Frequently Asked Questions (FAQs)
1. What is nutrition class 7?
Nutrition is a process in which any organism obtains its food to lead a life. There are two types of nutrition: autotrophic and heterotrophic.
2. What are the topics covered in NCERT Class 7 Science chapter 1?
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
3. How many questions are given in NCERT Class 7 Science Chapter 1 exercise?
There are 13 questions in NCERT Class 7 Science chapter 1
4. How do parasitic plants obtain their nutrition?
Parasitic plants obtain their nutrition by using specialized structures called haustoria to penetrate the host plant's tissues and connect to its vascular system, allowing them to extract water, nutrients, and even sugars.
5. What are insectivorous plants? How do they get their food?
Insectivorous plants, also known as carnivorous plants, are plants that supplement their nutrition by trapping and digesting insects and other small animals, often in nitrogen-poor environments.
6. What is the role of Rhizobium bacteria in plants?
Rhizobium bacteria, found in the root nodules of leguminous plants, play a crucial role in nitrogen fixation, converting atmospheric nitrogen into a usable form (ammonia) for plant growth and development.
7. How do saprotrophs obtain their food? Give examples.
Saprotrophs, like fungi and certain bacteria, obtain their food by secreting enzymes to break down dead organic matter into simpler substances, which they then absorb.
8. What is symbiosis? Give an example.
Symbiosis refers to a close and often long-term interaction between two different biological species, where at least one species benefits, and the other may benefit, be harmed, or remain unaffected. An example of symbiosis is the relationship between clownfish and sea anemones, where the clownfish is protected from predators by the anemone, and the anemone benefits from the clownfish cleaning it
9. Why do some plants eat insects?
Some plants eat insects, also known as carnivorous or insectivorous plants, because they grow in nutrient-poor soils, particularly those lacking nitrogen, and insects provide them with essential nutrients.
10. What is the function of nitrogen in plants?
Nitrogen is crucial for plant growth and development, forming the building blocks of essential molecules like amino acids, proteins, nucleic acids (DNA/RNA), and chlorophyll, which is vital for photosynthesis.
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