What defines, or distinguishes, a mammal from other vertebrates?

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    the fact that most mammals complete the great majority of their development outside the uterus
    its primitive, simple brain
    its hairless exterior
    milk-producing glands

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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milk-producing glands
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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