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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 Class 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 Nutrition 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 Science 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.
Q1. Why do organisms take food?
Answer:
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.
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 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.
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 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.
(ii) A plant that is partially autotrophic.
Answer:
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.
Answer:
Stomata pores are responsible through 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 feed 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 |
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)
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 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
Answer:
(iv) leaves takes carbon dioxide from the atmosphere.
Class 7 Science Chapter 1 Question Answer
Answer:
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.
Important Topics in Class 7 Science Chapter 1 Nutrition in Plants:
Section | Topic Name |
1 | Nutrition in Plants |
1.1 | MODE OF NUTRITION IN PLANTS |
1.2 | PHOTOSYNTHESIS — FOOD MAKING PROCESS IN Plants |
1.3 | OTHER MODES OF NUTRITION IN PLANTS |
1.4 | SAPROTROPHS |
1.5 | How NUTRIENTS ARE REPLENISHED IN THE Soil? |
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.
Chapter 1 | Nutrition in Plants |
Chapter 2 | Nutrition in Animals |
Chapter 3 | Fibre to Fabric |
Chapter 4 | Heat |
Chapter 5 | Acids, Bases and Salts |
Chapter 6 | Physical and Chemical Changes |
Chapter 7 | Weather, Climate and Adaptations of Animals to Climate |
Chapter 8 | Winds, storms and cyclones |
Chapter 9 | Soil |
Chapter 10 | Respiration in Organisms |
Chapter 11 | Transportation in Animals and Plants |
Chapter 12 | Reproduction in Plants |
Chapter 13 | Motion and Time |
Chapter 14 | Electric Current and its Effects |
Chapter 15 | Light |
Chapter 16 | Water: A Precious Resource |
Chapter 17 | Forests: Our Lifeline |
Chapter 18 | Wastewater Story |
We hope you will ace your examination with the help of NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants.
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
There are 13 questions in NCERT Class 7 Science chapter 1
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