Complete Darwin's view of how natural selection resulted in both unity and diversity of life. Match the terms in the left column to the appropriate blanks in the sentences on the right. Not all terms will be used.

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natural selection

evolutionary adaptation

According to his observations, Darwin proposed that the best-suited

would survive and

reproduce

successfully than those

adapted to their environment, and

he called this

populations

individuals in a population

This mechanism could account for both the unity and diversity of features among species. The

similarities between the descent organisms and their common ancestor explain the

less

of

life, while the force of natural selection in different environments accounts for the

of

unity

life.

more

diversity

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