Q:

What is an example of Allopatric speciation?

A:

A gene pool undergoes allopatric speciation when geographical distance, or a physical barrier such as a stretch of ocean, permits variation to grow such that gene flow across the population is permanently interrupted. The radiation of Darwin's finches in the Galapagos Islands is the classic example of allopatric speciation.

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The Galapagos Islands, off the west coast of South America, are home to 13 species of finches, often referred to as Darwin's finches. These species derive from an initial colonization event, in which the ancestral mainland finch arrived, and its descendants spread throughout the chain. Isolation, both from the mainland and from one island to the next, allowed variation to accumulate among the finches until they became separate species.

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    Why does geographic isolation cause speciation?

    A:

    Geographic isolation causes speciation because members of a population are unable to reproduce with one another. This reproductive isolation prevents mixing of the gene pool and allows each population to evolve along different paths according to the specific pressures present in the differing environments.

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    What is an example of a reverse fault?

    A:

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    What is an example of sympatric speciation?

    A:

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