mwahyydbigsia mwahyydbigsia

03-05-2017
Biology

contestada

In the beginning, the environment was free of air pollution and the light colored moths were more prevalent in the forest against the light colored trees. however, as air pollution started to increase, black colored moths were more prevalent in the forest.

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donaldfleming39 donaldfleming39

10-05-2017

That is because we have more pollution than we did back then

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