AP BIOLOGY

Detailed explanation-1: -The main factors responsible for the evolution of a new species from the existing ones are natural selection, genetic drift, geographical isolation, and mutation. Reproductive isolation and environmental factors on the isolated population are also responsible for the formation of new species.

Detailed explanation-2: -New species arise due to several factors: Natural selection. Geographical isolation. Reproductive isolation.

Detailed explanation-3: -Speciation is how a new kind of plant or animal species is created. Speciation occurs when a group within a species separates from other members of its species and develops its own unique characteristics.

Detailed explanation-4: -Speciation involves reproductive isolation of groups within the original population and accumulation of genetic differences between the two groups.

Detailed explanation-5: -Isolation can lead to new species formation because it stops gene flow. When organisms are isolated from each other the genetic changes which occur in one population remain restricted to that population. Over time these changes can eventually lead to reproductive barriers developing between the populations.