30. Which of the following situations dose NOT increase species diversity in a community?
(A) predation by keystone species.
(B) habitat heterogeneity.
(C) competitive exclusion.
(D) moderate disturbances.
(E) immigration of species.

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統計: A(15), B(3), C(40), D(3), E(4) #1118762

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40. According to the...
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