AP BIOLOGY

Detailed explanation-1: -Natural selection is a slow and gradual process which leads to the changes in the species or the formation of new species.

Detailed explanation-2: -Evolution is the process by which species adapt over time in response to their changing environment.

Detailed explanation-3: -Charles Darwin understood that evolution was a slow and gradual process. By gradual, Darwin did not mean “perfectly smooth, ” but rather, “stepwise, ” with a species evolving and accumulating small variations over long periods of time until a new species was born.

Detailed explanation-4: -Evolution is a gradual and continuing process of change that occurs over a period of time, due to slight variations in genetic compositions as well as changes in environment, leading to formation of new species.