​When a Physical Barrier Separates a Population, Leading to the Evolution

question 23

Multiple Choice

​When a physical barrier separates a population, leading to the evolution of new species on either side of the barrier, ____ has occurred.

• A) ​sympatric speciation
• B) ​allopatric speciation
• C) ​directional selection
• D) ​ecological isolation
• E) ​behavioral isolation

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