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Darwin's theory of evolution

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What kind of specimen (choose one) Darwin collected during his five-year voyage aboard the Beagle? How this piece of evidence contributed to Darwin's understnding of the mechanism of evolution?

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Darwin's theory of evolution is examined.

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During his voyage on the HMS Beagle, Darwin collected several species of finches. Finches are seed-eating passerine birds. Darwin studied 13 species that reside in the Galapagos island and one species that reside in the Cocos Islands.

The finches' beak depth helped Darwin conclude that ...

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