As the trees in England become less sooty due to
pollution controls on factories, which of the
following should occur?
a. Fewer dark moths should survive.
b. Numbers of dark and light moths won’t change
due to stabilizing selection.
c. Genetic mutations will be reversed.
d. More light-gray moths should survive.
e. Fewer dark moths should survive, and more
light-gray moths should survive.
Answer: e
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