AP BIOLOGY

Detailed explanation-1: -Darwin defined evolution as “descent with modification, ” the idea that species change over time, give rise to new species, and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.

Detailed explanation-2: -Descent with Modification Each living species has descended, with changes, from other species over time. Darwin called it as Descent with Modification. It also implies that all living organisms are related to one another. All species-living and extinct-were derived from common ancestors.

Detailed explanation-3: -According to the principle of common descent, all species-living and extinct-are descended from ancient common ancestors. Common Descent implies that life has been on Earth for a very long time. Darwin suggested that the fossil record was evidence of descent with modification over long periods of time.

Detailed explanation-4: -Darwin indicated that species could form by the evolution of one species splitting into two, or via a population diverging from its extant ancestor to the point it was a new species. Darwin’s insights into evolution were brilliant, especially in light of their being made in the absence of genetics.

Detailed explanation-5: -There are four principles at work in evolution-variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.