AP BIOLOGY

Detailed explanation-1: -Allopatric speciation (1) occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible for them to breed with one another.

Detailed explanation-2: -Geographical isolation means the separation of species by physical barriers like water forms, oceans, mountains, etc. The organisms are ultimately separated from exchanging genetic material with other organisms of the same species.

Detailed explanation-3: -Geographic isolation occurs when two populations are separated by geographic barriers such as rivers, mountains, or bodies of water.

Detailed explanation-4: -Allopatric speciation, also known as geographic speciation, is speciation that occurs when biological populations of the same species become isolated due to geographical changes such as mountain building or social changes such as emigration.

Detailed explanation-5: -Species are kept distinct from one another by prezygotic and postzygotic barriers. These barriers keep organisms of different species from mating to produce fertile offspring, acting before and after the formation of a zygote, respectively. These barriers maintain the reproductive isolation of species.