AP BIOLOGY

Detailed explanation-1: -For speciation to occur, two new populations must be formed from one original population, and they must evolve in such a way that it becomes impossible for individuals from the two new populations to interbreed.

Detailed explanation-2: -Reproductive isolation is not required for speciation because species are not defined by reproduction.

Detailed explanation-3: -Sympatric speciation occurs when there are no physical barriers preventing any members of a species from mating with another, and all members are in close proximity to one another.

Detailed explanation-4: -Speciation produces diversity of life on earth by splitting evolutionary lineages through the evolution of reproductive isolation between populations of a species. In ecological speciation, divergent natural selection to adapt to different environments results in the evolution of reproductive isolation.