Since the Pleistocene ice age,deserts have been gradually forming in the southwestern United States.As the original lakes and rivers of this area shrank into isolated streams and springs,the fishes living in them developed a strong potential for:

Question

Quizplus · Accepted Answer

The isolation of populations of fishes in isolated streams and springs in a desert environment over a long period of time provides an ideal scenario for natural selection to act on these populations. Over time, genetic differences will accumulate in each population, leading to the formation of new species (speciation).

Since the Pleistocene Ice Age,deserts Have Been Gradually Forming in the Southwestern