A storm blows a small group of migrating birds off course and they land on an island where they remain for 100 generations. At this time a second storm brings more birds from the mainland population to the island. These new birds cannot mate with the established birds even though they are woriginally from the same population. What mechanisms are likely to have been involved in bringing about this speciation? Select all that apply.
_____ Genetic drift
_____ Polyploidy in the mainland bird population.
_____ Founder effect
_____ Adaptation to a new ecological niche
__X__ Genetic drift
_____ Polyploidy in the mainland bird population.
__X__ Founder effect
__X__ Adaptation to a new ecological niche
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