Evolution & Natural Selection

Which best describes natural selection?

Which source of genetic variation introduces new alleles into a population?

Which scenario is the best example of an adaptation?

Allopatric speciation is most likely when:

Given a phylogenetic tree where species A and B share a more recent common node than either does with C, which inference is best?

Which line of evidence most directly supports descent with modification (common ancestry)?

Evolution is change in the genetic composition of a population over successive generations.

Natural selection always produces perfectly adapted organisms for every environment.

Genetic drift has a stronger effect on small populations than on large populations.