Chapter 22

Define the term" "species."

Given a group of organisms, describe how you would test whether they all belong to one species or whether they belong to two separate species.

Name two types of organisms that do not fit easily into the biological species concept.

Explain how ecological and evolutionary considerations can help inform whether or not a group of organisms represents a single species

Name four reproductive barriers and indicate whether each is pre- a post- zygotic.

Describe how genetic divergence and reproductive isolation ate related to each other.

Differentiate between allopatric and sympatric speciation, and state which is thought to be more common.

Differentiate between allopatric speciation by dispersal and by Vicariance, and give one example of each.

Describe how genetic drift can result in speciation.

Describe how natural selection can result in speciation.