Question

Which of the following statements about the autotrophs is incorrect?
A. They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll
B. They store carbohydrates in the form of starch
C. They corbon dioxide and water into carbohydrates in the absence of sulight
D. They constitude the first trophic level in food chains

Answer 1

Correct Answer - c
It is incorrect as , autotrophs can convert carbon dioxide and water into carbohydrates only in the presence of sunlight. The autotrophs contain the green pigment clled chlorophyll which is capable of trapping sun energy.
This trapped energy is utilised by them to make food by combining inorganic materials like `CO_(2) and H_(2)O` by the process of photosynthesis. The food that is not used immediately , is stroed in the form of strach . Theses autotroophs constitute the first trophic level in food chains.