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(Create a terrestrial food chain depicting four trophic levels.
(ii) Why do we not find food chains of more than four trophic levels in nature?
OR
How will you create an artificial aquatic ecosystem, which is self-sustainable?
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Answer:
1) Grass -- Insect -- Frog -- Snake -- Vulture.
2)
a) As, food chain are completed completely at four/five tropic levels.
b) It is a small unit of Food Web.
*Food web :- A group of food chains interlinked together is known as food web. c) One reson of non-existence of complex food chain is also that different species differ in their habitat and feeding habit.
Hope it is helpful....
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