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ARC-Easy / MCAS_8_2015_14 / A species of moth in England has both a light-colored form and a dark-colored…

Problem

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question

A species of moth in England has both a light-colored form and a dark-colored form. In the mid-1800s, the percentage of dark-colored moths increased in areas where black soot from factories covered the trees. The soot in these areas has decreased in more recent times as a result of pollution laws. Which of the following statements describes what has most likely happened to the moth populations in these areas?

choices

  • The moth populations went extinct.
  • The moth populations migrated south.
  • The percentage of light-colored moths in the populations decreased.
  • The percentage of dark-colored moths in the populations decreased.

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