ch24 the origin of species

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Author:
nanajun
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122121
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ch24 the origin of species
Updated:
2011-12-09 01:38:11
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bio
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  1. speciation
    =the formation of new species
  2. reproductive barriers
    =biological factors that keep species separate

    -some prevent mating, others block successful fertilization, or development of fertile offspring.
  3. allopatric speciation
    The formation of new species in populations that are geographically isolated from one another.
  4. sympatric speciation
    The formation of new species in populations that live in the same geographic area.

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