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The answer is E.) The Environment in terms of natural variation.
Added 4/17/2012 3:57:27 PM
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Janet17 [8/28/2014 4:21:58 PM]
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For two populations to evolve into two species that look different, reproductive isolation must happen.
Added 8/28/2014 4:21:30 PM
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The heritable variation among members of a population comes about because of: mutation.
Added 8/28/2014 4:23:46 PM
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