AP BIOLOGY

Detailed explanation-1: -Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes.

Detailed explanation-2: -Evolution: Evolution consists of changes in the heritable traits of a population of organisms as successive generations replace one another.

Detailed explanation-3: -Natural selection is the process through which species adapt to their environments. It is the engine that drives evolution.

Detailed explanation-4: -Darwin’s theory of evolution describes evolution as a slow, gradual continuous process of change. This could mean that evolutionary changes could occur over thousands or hundreds of thousands of years. It is so gradual that one cannot detect these changes in a lifetime, or even over several generations.

Detailed explanation-5: -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.