Classification below the species level is difficult because

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    sub-species populations tend to be largely genetically uniform
     genotypic and phenotypic variation is rarely observable below the species level
     if there is any significant variation in populations they are usually designated as separate species
     there is no objective way to know how much variation is enough to consider two populations of the same species as distinct
asked Jun 29, 2012 in Anthropology by anonymous
    

1 Answer

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there is no objective way to know how much variation is enough to consider two populations of the same species as distinct
answered Jun 30, 2012 by Bioshare ~Top Expert~ (34,070 points)

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