What is the evolutionary force that has kept populations from developing into separate species?

Question

Quizplus · Accepted Answer

Gene flow is the movement of individuals from one population to another. This exchange of genetic material helps prevent populations from developing differences that would lead to the formation of separate species. Gene flow increases genetic diversity and keeps populations interconnected, reducing the chances of divergence. The other options (founder's effect, mutation, and random genetic drift) can all contribute to speciation by introducing changes in the genetic makeup of populations.

What Is the Evolutionary Force That Has Kept Populations from Developing