Question

multiple-choice question what can cut a single gene pool into two gene pools? a change in allele frequencies a gene flow barrier rewatch

Explanation:

A gene flow barrier prevents gene exchange between populations, splitting one gene pool into two. A change in allele frequencies (like genetic drift or natural selection) modifies a gene pool but doesn't split it. So the correct option is "A gene flow barrier".

Answer:

B. A gene flow barrier (assuming the second option is labeled B; if the first was A and second B, the correct is B. If labels differ, adjust, but based on content, the correct choice is the one with "A gene flow barrier").