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Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

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Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

(a) Isolation (b) Mutation (c) Natural selection (d) Sexual reproduction

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(a) Origin of new species depends on isolation of gene flow between new species and develop significant genetic divergence.

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