Asked by b
Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?
They have many niches.
They have many organisms that live on them.
They allow for automatic biogeographic isolation.
They allow for many variations to exist in species.
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Answered by
GPT-5 mini
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They allow for automatic biogeographic isolation.
Islands isolate populations (reducing gene flow), so new mutations and selection act independently — leading to divergence and adaptive radiation (as with Darwin’s finches).
Islands isolate populations (reducing gene flow), so new mutations and selection act independently — leading to divergence and adaptive radiation (as with Darwin’s finches).
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