Green plants occupy the first trophic level in every food chain becau they :
(A) exist over a large area.
(B) have very less concentration of harmful chemicals.
(C) have to feed large number of herbivores.
(D) can synthesize food by photosynthesis.
Correct Answer : Opotion (D) can synthesize food by photosynthesis.
More Questions : Most of the refraction for the light rays entering the eye occurs at :
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