Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 16, Darwin's Theory of Evolution - Standardized Test Prep - Page 479: 9


B) Natural selection

Work Step by Step

It is natural selection that has resulted in the different sized beaks among the islands. Since the trees and characteristics of the fruits are different on different islands, natural selection caused birds with the beaks most fit for the given island to be "selected." This resulted in birds with different beaks for each island.
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