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Question

(A) 10 kcal/m2/yr

(B) 100 kcal/m2/yr

(C) 1,000 kcal/m2/yr

(D) 1,00,000 kcal/m2/yr

Refer to the above diagram of energy pyramid. The ecological efficiency at primary consumer level, in comparison to that at secondary consumer level, is


A

same

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B

more

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C

less

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D

can not be ascertained from the data

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Solution

The correct option is A

same


Ecological efficiency describes the efficiency with which energy is transferred from one trophic level to the next. If one observes the diagram above, the efficiency of producers is only 0.1% but the primary consumers and top consumers have 10% efficiency.

Thus, primary consumers and secondary consumers have same ecological efficiency.


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