Question

According to Darwin's ideas, what is the cause of a change in the adaptations of a species over time? Describe a specific example.

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According to Darwin, the changes in the adaptations of species are caused by some changes in the environment. If old traits become not suited to the new environment, evolution via natural selection happens. One example is the way the color of the moths adapted to the changing environment during industrialization. Pollution has stained trees and caused the color of the moths to become darker. Because of this, it protected them against the birds that prey on them. Instead, the birds consumed light-colored moths, which resulted in a decline in the population of light-colored moths. This is the reason why there are more dark-colored moths in urban areas.

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