Assertion :The community of an ecotone commonly contains the organism of each of the overlapping communities and in addition the organism which are restricted to the ecotone. Reason: The tendency for increased variety and density at community junctions is known as the edge effect.

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
The community of an ecotone commonly contains the organism of each of the overlapping communities and in addition the organism which is restricted to the ecotone. And the tendency for increased variety and density at community junctions is known as the edge effect. But the edge effect is not the reason for overlapping communities in the ecotone.
So, the correct option is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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