Question

Which of the following cannot be a food chain?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper

• A. (i) and (iii)
• B. (iii) and (iv)
• C. (ii) and (iii)
• D. (i) and (iv)

Answer 1

The correct option is C (ii) and (iii)

• Food chain is the sequence of transfers of matter and energy in the form of food from organism to organism.
• In (i) and (iv) the food chain is possible while in (ii) and (iii) it is not.
• In option (ii) grasshopper is not part of aquatic food chain.
• In option (iii) none of them eat grass.