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Finches developed special beaks that help them eat either insects or seeds, depending on which is more plentiful in their area. Why is this a good example of an adaptive function?

Select one:
A. There is a lot of variation in beak type.
B. Different beak types make finches less likely to be eaten by a predator.
C. Finches learned to communicate about food options.
D. Different beak types help the finches survive in their environment.

Answer :

Finches display a variety of beak shapes due to adaptive radiation, where each beak type is specialized for their dietary needs, such as cracking nuts, reaching nectar, or catching insects, demonstrating a significant aspect of natural selection.

The development of special beaks in finches is a good example of an adaptive function because it illustrates how different beak types aid in the survival of the species within their environment. Natural selection has shaped these beaks to make them suited for their specific food sources. As a result, seed-eating finches developed thicker, stronger beaks ideal for breaking hard nuts, nectar-eating finches evolved long beaks to access nectar deep within flowers, and insect-eating finches have beak shapes like swords which are perfect for impaling insects. This diversification in beak shape among Darwin's finches is a clear showcase of the process of adaptive radiation within an archipelago.

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