Drosophila Pseudoobscura and D

question 6

Multiple Choice

Drosophila pseudoobscura and D.persimilis are two fly species that live in the western United States.The smaller geographic range of D.persimilis is enclosed within the range of D.pseudoobscura.Research shows that D.pseudoobscura taken from areas that overlap with D.persimilis are less likely to mate with D.persimilis than are the D.pseudoobscura flies from populations that do not come into contact D.persimilis.What is the most likely explanation for these results?

• A) Temporal isolation
• B) The Dobzhansky-Muller model of reproductive isolation
• C) Reinforcement
• D) Habitat Isolation
• E) Adaptive radiation