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What event in history led to the dark-Colored peppered moth being better able to survive than the Lighter-Colored variety

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Answer:A) The pollution from the Industrial Revolution darkening the trees.

Step-by-step explanation:

User Kzryzstof
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The smoke from the industrial revolution's factories made it so the trees turned black. The white colored moths couldn't survive anymore because they didn't blend into the trees. One day a genetic mutation happened, and the moth turned dark. The dark moth was able to survive better, and therefore, mated, and produced more dark colored ones. 
User WillHaslett
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