試題詳解

34. The principle of competitive exclusion states that ________
(A)competition between two species always causes extinction or emigration of one species.
(B)two species cannot coexist in the same habitat.
(C)two species will stop reproducing until one species leaves the habitat.
(D)two species that have exactly the same niche cannot coexist in a community.
(E)can create the new species.