Crash Course: Biology: Speciation: Of Ligers and Men
00:00:18 - 00:05:27

Hank explains what defines a species: the ability to create fertile offspring. He also explains the conditions that are required to create an entirely new species.

Key Words: Species, Hybrids, Evolution, Speciation, Reproductive Isolation, Post-zygotic, Pre-zygotic, Allopatric Speciation, Natural Selection 

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