Which factor most likely contributed to the evolution of Galapagos Island finches with different beak shapes?

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Why do Galápagos finches have different beaks?

On the Galápagos, finches evolved based on different food sources — long, pointed beaks served well for snatching insects while broad, blunt beaks work best for cracking seeds and nuts.

What caused the Galapagos finch to evolve?

We show that Darwin's finches on a Galapagos island underwent two evolutionary changes after a severe El Nino event caused changes in their food supply. Small beak sizes were selectively favoured in one granivorous species when large seeds became scarce.

Which factors most likely had a role in the development of beak characteristics in the ground finch?

The most likely explanation for the increase in average beak size of the medium ground finch is that the.
A. Trait is inherited and birds with larger beaks have greater reproductive success..
B. Lack of small seeds caused a mutation which resulted in a larger beak..
C. ... .

How did the different beak types first arise in the Galápagos finches?

How did the different beak types first arise in the Galapagos finches? Changes in the finches' beaks occurred by chance, and when there was a good match between beak structure and available food, those birds had more offspring.

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