Question

what is meant by food chain? " the number of trophic levels in a food chain is limited." give reason to justify this statement

Answer 1

Simple representation of energy flow in nature is called food chain.

Because the energy available to each level is only 10% of the energy that the lower level has available to it. After, the 3rd consumer there isn't that much energy left over.

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Answer 2

"Food chain is a simple representation of energy flow in nature".

For example: A rat eats grains, a snake eats a rat, which in turn is eaten by an eagle.

In a food chain, the number of Tropic levels are limited to 4-5.This is because according to 10% law of energy transfer,only 10%of energy passes from one Tropic level to next. Thus the amount of energy decrease with successive Tropic levels.After five Tropic levels, existence with such negligible amount of energy.

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