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Question : A: Niche become general and broader during biotic succession. R: Species diversity increases but organic matter is decreased.

Answer»

If both Assertion &Reason are true and the reason is the corect EXPLANATION of the assertion , then mark (1)
If both Assertion & Reason are true but the reason, is not the correct explanation of the assertion , then mark (2)
If Assertion is true STATEMENT but Reason is false , them mark (3).
If both Asseration and Reason are false statements , then mark (4).

Answer :D


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