Q.1. Why do organisms take food?
Q.2. Distinguish between a parasite and a saprotroph.
Q.3. How would you test the presence of starch in leaves?
Q.4. Give a brief description of the process of synthesis of food in green plants.
Nutrition In Plants Chapter 1 Class 7 Science
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Why do organisms take food?
Q.1. Why do organisms take food?
Q.2. Distinguish between a parasite and a saprotroph.
Q.3. How would you test the presence of starch in leaves?
Q.4. 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.
NIL
Class 7
(b) The food synthesized 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.
(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.
(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 (iv) pitcher plant (iv) rose
Column I Column II
Chlorophyll Rhizobium
Nitrogen Heterotrophs
Cuscuta Pitcher plant
Animals Leaf
Insects Parasite
(i) Carbon dioxide is released during photosynthesis. (T/F)
(ii) Plants which synthesis 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)
Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Petals
(i) roots (ii) stem (iii) flowers (iv) leaves
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