Assertion :The species is reproductively isolated natural population. Reason: Prokaryotes cannot be kept under different species on the basis of reproductive isolation.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Prokaryotes, e.g., bacteria reproduce very fast and in the process can transfer genetic material by various pathways, one of them being horizontal transfer. Thus it becomes very difficult to segregate them on the basis of reproductive isolation. The genetic recombination and mutations also make it impossible to maintain the same gene pool.
Hence, the answer is - 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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