Q15 of 38 Page 106

Which group of organisms are not constituents of a food chain?

(i) Grass, lion, rabbit, wolf


(ii) Plankton, man, fish, grasshopper


(iii) Wolf, grass, snake, tiger


(iv) Frog, snake, eagle, grass, grasshopper

Since at first trophic level comes the producers, then comes herbivores and then carnivores. This is not followed in option (ii) and (iii) and therefore, option (ii) and (iii) are not constituents of a food chain.

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