If Two Populations Are Re-Introduced After Being Genetically Isolated for a Long

question 71

Multiple Choice

If two populations are re-introduced after being genetically isolated for a long time, how could you tell if they've become two different species?

• A) If they fight with each other, they must be two different species.
• B) If they are unable to interbreed successfully, they must be two different species.
• C) If they avoid each other completely, they must be two different species.
• D) If they were genetically isolated for a long time, they must be two different species.
• E) There's no way to determine whether they've become two separate species.

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