Question

two species of flies, drosophila melanogaster and drosophila simulans, can mate. they usually do not mate, however, even if they are kept together in a laboratory. males court the females of both species, but the females prefer to mate with males of their own species. which isolating mechanism does this describe?
behavioral
temporal
artificial
anatomical

Explanation:

Behavioral isolation occurs when differences in behavior, such as mating preferences, prevent inter - species mating. In this case, female flies prefer to mate with males of their own species, which is a behavioral trait. Temporal isolation involves differences in mating times. Artificial is not a standard biological isolating mechanism here. Anatomical isolation would involve physical incompatibilities.

Answer:

behavioral