Which of the following procedures was most likely followed to determine the change in beak size?
a. A few finches were trapped in 1981 and again in 1987 and the beak size in the original finches was determined by estimation
b. The beak size in fifteen finches was measured in 1987 and the beak size in the original finches was determined by estimation
c. The beak size in a large number of finches was measured every year from 1981 to 1987
d. Finches were captured and bred in 1981 and the beak size of the offspring was measured
Answer: c. The beak size in a large number of finches was measured every year from 1981 to 1987
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