Which of the following must occur for one species to split into two or more species?

Question

Quizplus · Accepted Answer

DNA sequence differences accumulating over time is an important criterion used to define a species as distinct from other species. When two populations of a species diverge genetically to the extent that they cannot interbreed and produce viable offspring, they are considered separate species.

Answer: D
 Geographic isolation occurs when one population becomes physically separated from the rest of the species, so that there is no interbreeding between the two groups. Over time, genetic differences may accumulate between the two isolated populations, and if these differences are substantial enough, they may lead to the formation of two or more distinct species.

Which of the Following Must Occur for One Species to Split