In Seedcracker Finches from Cameroon, Small- and Large-Billed Birds Specialize

question 45

Multiple Choice

In seedcracker finches from Cameroon, small- and large-billed birds specialize in cracking soft and hard seeds, respectively. If long-term climatic change resulted in all seeds becoming hard, what type of selection would then operate on the finch population?

• A) disruptive selection
• B) directional selection
• C) stabilizing selection
• D) No selection would operate because the population is in Hardy-Weinberg equilibrium.