Question

what are the two phases of speciation?
○ geographic isolation and variation
○ adaptation and reproductive isolation
○ adaptation and variation
○ geographic isolation and reproductive isolation

Explanation:

Speciation is the process of forming new species. The two main phases of speciation involve first the separation of populations (geographic isolation) and then the development of barriers to interbreeding (reproductive isolation). Geographic isolation separates groups, and reproductive isolation ensures they become distinct species. The other options mix concepts like adaptation (a result of natural selection) or variation (raw material for evolution) which are not the two phases of speciation.

Answer:

D. geographic isolation and reproductive isolation