The document discusses Chapter 1 of Class VII science, focusing on nutrition in plants, including questions and answers on food requirements of organisms, the process of photosynthesis, and the distinction between autotrophs and heterotrophs. It includes various types of questions such as fill-in-the-blanks, true or false, and matching items related to the topic. Additionally, it provides specific examples of parasitic and carnivorous plants while explaining how plants synthesize food and absorb carbon dioxide.

1. Class–VII (CHAPTER-01) NUTRITION IN PLANTS
Questions
1. Why do organisms need to take food?
2. Distinguish between a parasite and saprophyte.
3. How would you test the presence of starch in leaves?
4. Give the brief description of the process of synthesis of food in
green plants.
5. Show with the help of a sketch that the plants are ultimate
source of food.
6. Fill in the blanks:
(a) Green plants are called ----------- since they synthesize their
own food.
(b) The food synthesized by the plants is stored as ---------------.
(c) In photosynthesis solar energy is captured by the pigment
called ------------.
(d) During photosynthesis plants take in ------------- and release
--------------.
7. Name the following:
(a) A parasitic plant with yellow, slender and tubular stem.
(b) A plant that has both autotrophic and heterotrophic mode of
nutrition.
(c) The pores through which leaves exchange gases.

2. 8. Tick the correct answer:
(a) Amarbel is an example of :
(i) Autotroph
(ii) Parasite
(iii) Saprophyte
(iv) Host
(b) The plant which traps and feeds on insects is:
(i) Cuscuta
(ii) China rose
(iii) Pitcher plant
(iv) Rose
9. Match the item in given column I with those in column II.
Column I Column II
Chlorophyll Bacteria
Nitrogen Heterotrophs
Amarbel Pitcher plant
Animals Leaf
Insects Parasite
10. Mark “T” if the statement is true and “F” if it is false:
(i) Carbon dioxide is released during photosynthesis. (T/F)
(ii) Plant which synthesis their food themselves are called
saprotrophs. (T/F)
(iii) The product of photosynthesis is not a protein. (T/F)

3. (iv) Solar energy is converted into chemical energy during
photosynthesis. (T/F)
11. Choose the correct option from the following:
Which part of plant gets carbon dioxide from the air for
photosynthesis?
(a) Root hair
(b) Stomata
(c) Leaf veins
(d) Sepals
12. Choose the correct option from the following:
Plants take carbon dioxide from the atmosphere mainly
through their:
(a) Roots
(b) Stem
(c) Flowers
(d) Leaves

4. Class–VII (CHAPTER-01) NUTRITION IN PLANTS
Answers
1. Organism needs food to
(i) Survive
(ii) Growth
(iii) Gain Energy
(iv) Damage repair
(v) Maintain bodily functions
(vi) Other activities.
2.
3. When starch comes in contact with iodine solution, gives a
characteristic dark blue color. So, when we add a few drops of
iodine solution on leaf and if the dark blue color appears, that will
confirm the presence of starch in leaves.
4. In green plants, the synthesis of food occurs by a process called
photosynthesis. During this process, chlorophyll in the cells of
the leaves uses carbon dioxide and water to synthesize

5. carbohydrates in the presence of sunlight. The process can be
represented by an equation:
During this process oxygen is liberated and the formed
carbohydrates is stored in the form of starch.
5.
6. Fill in the blanks:
a. Green plants are called autotrophs since they synthesize
their own food.
b. The food synthesized by the plants is stored as starch.
c. In photosynthesis solar energy is captured by the pigment
called chlorophyll.
d. During photosynthesis plants take in carbon dioxide and
release oxygen.
7. (i) Cuscuta
(ii) Pitcher plant
(iii) Stomata
8. (a) (ii) parasite
(b) (iii) Pitcher plant
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6. 9.
10. (i) F
(ii) F
(iii) T
(iv) T
11. (ii) Stomata
12. (iv) leaves
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