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Species A is a mainland bird species. A small group of species A birds is blown onto a nearby island. The resources on the island are different from those on the mainland, and soon the population evolves into species B because there is no contact with birds from the mainland population.Which two factors contributed to the rapid development of species B? An increase in gene flow between the two populations A large gene pool in the island population A reduction in gene flow between the populations A small gene pool in the island population
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