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  • Which group of organisms are not constituents of a food chain(i) Grass, lion, rabbitwolf (ii)Plankton man fishgrasshopper(iii)Wolf,grass snake,tiger (iv)Frog snakeeagle grassgrasshopper(a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and(iii)(d)(i)and'(iv))

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

(a) (i) and (iii)                       (b) (iii) and (iv)

(c) (ii) and (iii)                      (d) (i) and (iv)

Answers (1)

Ans. (c)
The flow of energy starting with one living being then onto the next at various biotic levels forms a food chain. A food chain
portrays the feeding connections between the life forms within that ecosystem.

(i) is forest food chain
Grass — Rabbit — Wolf — Lion
Lion consumes a wolf, wolf consumes a rabbit and rabbit consumes grass for energy.
(ii) is an aquatic food chain in which grasshopper cannot take part. Instead of grasshopper, Zooplankton should have been given
Plankton — Zooplankton — Fishes — Man
(iii) Wolf, snake and tiger all are carnivores. There is no herbivore to eat grass in this chain. So the initial transfer of energy is missing.
(iv) Grass - Grasshopper - Frog - Snake - Eagle, is a proper food chain.

Therefore option (C) is correct

 

 

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infoexpert27

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