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Recommended textbook solutions Biology1st EditionKenneth R. Miller, Levine 2,591 solutions Nelson Science Perspectives 101st EditionChristy C. Hayhoe, Doug Hayhoe, Jeff Major, Maurice DiGiuseppe 1,359 solutions Biology1st EditionKenneth R. Miller, Levine 2,470 solutions
Texas Science Fusion: Grade 61st EditionHolt McDougal 556 solutions How did the drought lead to an increase in beak size?In 1977 a drought reduced the number of small seeds available for the birds, forcing them to rely on larger seeds requiring considerable force to open. Within a couple generations, beak size, and hence ability to open large seeds, had increased.
What do you think caused the changes in the finch population and average beak size during the drought?Because the drought reduced the number of seeds and finches with bigger beaks were able to eat the larger and harder seeds so more of them survived.
Which of the following was most likely followed to determine the change in beak size?Which of the following procedures was most likely followed to determine the change in beak size? A few finches were trapped in 1981 and again in 1987, and their beak sizes were compared. The beak size in fifteen finches was measured in 1987, and the beak size in the original finches was determined by estimation.
What do the different beaks tell us about the different finch species?Differences in beak shapes tell us that all the finches eat the same type of food. Different finch beak shapes are evidence that all Galápagos finches shared a common ancestor a long time ago. Different finch beak shapes are evidence that over time, finch species adapted to different food sources on the islands.
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Which if the following statements might best explain the increase in average beak size in the finch population during the drought?
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