Consider the following statements concerning food chains

(A) Removal of 80% tigers from an area resulted in increased growth of vegetation

(B) Removal of most of the carnivores resulted in an increased population of deers

(C) The length of food chains is generally limited to 3-4 trophic levels.

(D) The length of food chains may vary from 2 to 8 trophic levels.

Which two of the above statements are correct?

A, B

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B, C

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C, D

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A, D

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Solution

The correct option is B
B, C

As carnivores are absent, deer population rises as their predator is absent. The length of food chains is generally limited to 3-4 trophic levels.

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Choose the correct one from the following statements

1. Each organism occupies one trophic level in a food chain.

2. A trophic level in a food chain may be occupied by any of the producers, herbivores, carnivores or decomposers

3. Top consumers in a food chain generally feed on secondary consumers.

4. GFC and DFC are the common food chains and the latter is having maximum energy than the first

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