What is the process by which geographic barriers cause populations to diverge and form new species?

Prepare for your Environmental Science Exam 1 with our interactive quiz. Test your knowledge with various question types featuring detailed explanations. Start today and ace your exam!

Multiple Choice

What is the process by which geographic barriers cause populations to diverge and form new species?

Explanation:
Allopatric speciation is the process at play when geographic barriers split populations and prevent gene flow. Once the barrier separates groups, each side evolves independently through mutations, natural selection, and genetic drift. Over many generations, the accumulated differences lead to reproductive isolation, so the two populations can no longer interbreed, even if the barrier were removed, forming new species. This distinguishes the idea from general ecology or habitat, which describe environments or interactions rather than the mechanism by which new species arise.

Allopatric speciation is the process at play when geographic barriers split populations and prevent gene flow. Once the barrier separates groups, each side evolves independently through mutations, natural selection, and genetic drift. Over many generations, the accumulated differences lead to reproductive isolation, so the two populations can no longer interbreed, even if the barrier were removed, forming new species. This distinguishes the idea from general ecology or habitat, which describe environments or interactions rather than the mechanism by which new species arise.

More practice questions