Study the following statements about energy flow and identify the true statements.
I) The energy trapped by the producer is either passed on to a consumer or the organism dies.
II) Energy flow is not unidirectional in the ecosystem.
III) Death of an organism is the beginning of the detritus food chain.
IV) The consumers that feed on herbivores are primary consumers.

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II and IV

I and IV

II and III

I and III

answer is D.

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Detailed Solution

I The energy trapped by the producer is either passed on to a consumer or the organism dies.
II Energy flow is unidirectional in the ecosystem.
III Death of an organism is the beginning of the detritus food chain.
IV The consumers that feed on herbivores are secondary consumers.

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