NCERT Solutions for Class 7 Science Chapter 1 Nutrition in Plants
Learn from School Connect Online in this chapter we will learn that all living organisms require food. Food gives energy to the organisms for the growth and maintenance of their body functions. Carbohydrates, proteins, fats, vitamins and minerals are the essential components of food. These components of food are necessary for our body and are called nutrients.
Download PDF of NCERT Solutions for Class 7 Science
|NCERT Solutions Download Class 7||Chapter Name||NCERT Solutions Download Class 7||Chapter Name|
|NCERT Solutions For Class 7 Science Chapter 1: Nutrition In Plants||Nutrition in Plants||NCERT Solutions for Class 7 Chapter 10 Respiration in Organisms||Respiration in Organisms|
|NCERT Solutions for Class 7 Chapter 2 Nutrition in Animals||Nutrition in Animals||NCERT Solutions for Class 7 Chapter 11 Transportation in Animals and Plants||Transportation in Animals and Plants|
|NCERT Solutions for Class 7 Chapter 3 Fibre to Fabric||Fibre to Fabric||NCERT Solutions for Class 7 Chapter 12 Transportation in Animals and Plants||Reproduction in Plants|
|NCERT Solutions for Class 7 Chapter 4 Heat||Heat||NCERT Solutions for Class 7 Chapter 13 Motion and Times||Motion and Times|
|NCERT Solutions for Class 7 Chapter 5 Acids,Bases and Salts||Acids,Bases and Salts||NCERT Solutions for Class 7 Chapter 14 Electric Current and its Effects||Electric Current and its Effects|
|NCERT Solutions for Class 7 Chapter 6 Physical and Chemical Changes||Physical and Chemical Changes||NCERT Solutions for Class 7 Chapter 15 Light||Light|
|NCERT Solutions for Class 7 Chapter 7||Weather,Climate and Adaptations of Animals to Climate||NCERT Solutions for Class 7 Chapter 16 Water;A precious resource||Water;A precious resource|
|NCERT Solutions for Class 7 Chapter 8||Winds Storms and Cyclones||NCERT Solutions for Class 7 Chapter 17 Forests;Our life line||Forests;Our life line|
|NCERT Solutions for Class 7 Chapter 9||Soil||NCERT Solutions for Class 7 Chapter 18 Waste water story||Waste water story|
1. Why do organisms take food?
All organisms require energy for their life processes. Plants prepare their food and acquire nutrients from abiotic components like soil, air, water and sunlight. On the other hand, animals need to get food from either plants or other animals to obtain nutrients; hence animals need to take food to acquire nutrients and energy.
2. Distinguish between a parasite and a saprophyte.
|Acquire nutrients from dead and decaying matter||Parasites live on or in a host and get its food at the expense of its host|
|Example: Fungi||Example: roundworm|
3. How would you test the presence of starch in leaves?
Take two potted plants of the same kind. Keep one in the dark for 72 hours and the other in sunlight. Perform the iodine test with the leaves of both the plants as given below. Now leave the pot which was earlier kept in the dark, undisturbed for 3 – 4 days and perform the iodine test again on its leaves.
Put iodine solution on the leaf
Blue-black colour will be observed on the leaves of the plant kept in sunlight, which indicates the presence of starch.
Blue-black colour will not be observed on the leaves of plants kept in the darkroom. This indicates the absence of starch.
4. Give a brief description of the process of synthesis of food in green plants
Green plants use a process called photosynthesis to prepare their food. The process is as follows
- Water is taken from the roots of the plant, and it is transported to the leaves of the plant.
- Carbon dioxide from air enters the leaves through pores called stomata. This diffuses the cell containing chlorophyll.
- Water molecules are broken down into Hydrogen and Oxygen with the help of sunlight.
- Hydrogen combines with Oxygen and Hydrogen to form carbohydrates.
- Photosynthesis is represented by the following equation.
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.
(a) Green plants are called autotrophs since they synthesise their 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.
7. Name the following:
i) A parasitic plant with yellow, slender and branched stem.
ii) A plant that is partially autotrophic.
iii) The pores through which leaves exchange gases.
ii) Pitcher plant
8. Tick the correct answer:
(a) Cuscuta is an example of:
(b) The plant which traps and feeds on insects is:
(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
The answer is (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
Answer is : (iv) leaves
13. Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?
Fruits and vegetable crops are grown in large greenhouses because it protects crops from external climatic conditions and provide suitable temperature for the growth of crops.
Advantages to farmers while growing fruits and vegetable crops inside greenhouses are
- It protects crops from diseases and adverse climatic conditions.
- It protects crops from wind and rodents
CBSE Notes for Class 7 Science Free Download for All Chapters
|CBSE Class 7 Science Study Notes||CBSE Class 7 Science Study Notes|
|Nutrition in Plants Class 7 Notes Chapter 1||Respiration in Organisms Class 7 Notes Chapter 10|
|Nutrition in Animals Class 7 Notes Chapter 2||Transportation in Animals and Plants Class 7 Notes Chapter 11|
|Fibre to Fabric Class 7 Notes Chapter 3||Reproduction in Plants Class 7 Notes Chapter 12|
|Heat Class 7 Notes Chapter 4||Motion and Times Class 7 Notes Chapter 13|
|Acids,Bases and Salts Class 7 Notes Chapter 5||Electric Current and its Effects Class 7 Notes Chapter 14|
|Physical and Chemical Changes Class 7 Notes Chapter 6||Light Class 7 Notes Chapter 15|
|Weather,Climate and Adaptations of Animals to Climate Class 7 Notes Chapter 7||Water;A precious resource Class 7 Notes Chapter 16|
|Winds Storms and Cyclones Class 7 Notes Chapter 8||Forests;Our life line Class 7 Notes Chapter 17|
|Soil Class 7 Notes Chapter 9||Waste water story Class 7 Notes Chapter 18|
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