The phrase "natural population" is important to the definition of species because:

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    if two populations co-occur but do not interbreed in nature, they are separate species.
    if two populations interbreed only in captivity, they are members of the same species.
    if two populations can potentially interbreed, they are different species.
    if two populations do not co-occur, they must be different species because they cannot interbreed.
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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if two populations co-occur but do not interbreed in nature, they are separate species.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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