Biologists have discovered that many islands contain a variety of unique species. Generally, these species are found nowhere else in the world.

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Biologists have discovered that many islands contain a variety of unique species. Generally, these species are found nowhere else in the world. A bird species found on an island is similar in appearance to a bird found on the mainland, but the two species cannot produce offspring. Which of the following is a logical conclusion that can be reached regarding these bird species? ( 2 points)

Select one:

a. Allopatric speciation has occurred as a result of geographic isolation.

b. Hybridization has occurred as a result of reduced gene flow.

c. Reproductive isolation has occurred as a result of prezygotic barriers.

d. Sympatric speciation has occurred as a result of postzygotic barriers.

 
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