As mentioned, cliff swallows commonly nest underneath highway bridges. use the
pattern of data in the chart below to explain what is happening in the cliff
swallow population over the time period scientists observed them. be sure to
include in your explanation:
(1) the advantage of shorter versus longer wings;
(2) your ideas about the likely pressures of the environment;
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(3) the data on wing length for swallows that survived; and
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(4) the mechanism that drives the changes in the data you see,
note: wing length is a heritable trait.