Is there an "optimum" beak size for finches?
a) No, beak size in finches appears to be dependent on the amount of rainfall.
b) Yes, sexual selection always selects for the largest beak size.
c) Yes, larger beaks are always better for finches.
d) Yes, smaller beaks are always better for finches.
e) No, beak size stays the same, regardless of environmental factors.
Answer: a) No, beak size in finches appears to be dependent on the amount of rainfall.
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Fill in the blank(s) with the appropriate word(s).
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