polluted forests would have ____________ colored moths.; how did kettlewell directly study the moths?; how did kettlewell determine if moths lived longer than others; explain the concept of natural selection using your moths as an example.; how did kettlewell test his hypothesis; explain how the color of the moths increases or decreases their chances of survival.

Answer :

Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths.

To directly study bird predation on the moths, Dr. Kettlewell placed light and dark moths on the trunks of trees where he could observe them. He recorded the times a bird found the moth. He found that on dark tree trunks, birds were twice as likely to eat a light moth as a dark moth.

He recorded the times a bird found the moth. He found that on dark tree trunks, birds were twice as likely to eat a light moth as a dark moth. The same birds would find the dark moth twice as often if the bark on the tree was light. This supported the idea that dark moths had a survival advantage in a dark forest.

Natural selection refers to the differential survival and reproduction of individuals better adapted to their environments.

As the trees darkened with soot, the light-colored moths were easier to see. They were eaten by birds more and more, while the rare dark colored moths blended in better on the darker trees. This made the dark colored moths have a higher survival rate.

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