Biology I Chapter 22
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Biology I Chapter 22
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Free Flashcard From Biology I Chapter 22
Question:
During drought years on the Galapagos, small, easily eaten seeds
become rare, leaving mostly large, hard-cased seeds that only birds with
large beaks can eat. If a drought persists for several years, what
should one expect to result from natural selection? A) Small birds gaining larger beaks by exercising their mouth parts. B) Small birds mutating their beak genes with the result that later-generation offspring have larger beaks. C) Small birds anticipating the long drought and eating more to gain weight and, consequently, growing larger beaks.D) More
small-beaked birds dying than larger-beaked birds. The offspring
produced in subsequent generations have a higher percentage of birds
with large beaks.E) Larger birds eating less so smaller birds can survive.
Answer:
D