NEET 2007 Biology question

One of the important consequences of geographical isolation is:

(1)Random creation of new species
(2)No change in the isolation faunax
(3)Preventing Speciation
(4)Speciation through reproductive isolationCorrect

Answer: (4)

Solution

When a population is split by a geographical barrier, gene flow stops; the separated populations accumulate different mutations and are acted on by different selection pressures. Eventually they become

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Question ID VK-089759