Darwin's finches, collected from the Galápagos Islands, illustrate which of the following?
A) mutation frequency
B) ancestors from different regions
C) descent with modification
D) the accuracy of the fossil record

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Darwin's finches are a classic example used by Darwin to explain his theory of evolution by natural selection in his book "On the Origin of Species". He observed that the finches had unique beaks adapted to different types of food, and postulated that they evolved through descent with modification from a common ancestor. This observation supported his theory that species evolve over time through the process of natural selection, which acts on genetic variations within populations.

Darwin's Finches, Collected from the Galápagos Islands, Illustrate Which of the Following