Question

1. While drift may, in fact, be important in all of the following forms of speciation, which form is it thought to be MOST important?
   1. Allopatric
   2. Sympatric
   3. Parapatric
   4. Peripatric
   5. Driftiatric
2. Hybridization and gene flow occurs in a narrow zone of contact in which form of speciation?
   1. Allopatric
   2. Sympatric
   3. Parapatric
   4. Peripatric
   5. None of the above
3. Which evolutionary force, acting alone, can cause a population to “ fall off” of an adaptive peak?
   1. Natural selection
   2. Random genetic drift
   3. Directed genetic drift
   4. Speciation
   5. Mutation

Answer 1

1. A. Allopatric

2. C. Parapatric speciation

In parapatric speciation the two populations begin to diverge genetically while continuing to exchange migrants across a small zone of contact.

3. Random genetic drift