Question

Consider the impacts on the bird population and its gene pool. __________ is responsible for gene flow and an important mechanism for genetic variation.

A) emigration only
B) immigration only
C) neither emigration or immigration
D) both emigration and immigration

Answer 1

I would say immigration only.

emigration would theoretically reduce the genetic variation as unique individuals leave, but immigration would bring unique traits into circulation in an ecosystem.

I'm not super great at biogy tho so this might not be right... :)

Answer 2

its both emigration and immigration (D)