Chapter 23

Give two examples of a nested pattern of similarity among organisms.

Distinguish among monophyletic, puraphyletic, and polyphyletic groups, and give an example of each.

List the levels of classification, from the least inclusive (species) to the most inclusive (domain).

Describe two traits that are homologous and two that are analogous.

Name a type of homology that is useful in building phylogenetic trees and explain why this kind of homology, and nut others, is useful.

Name three types of fossil.

Explain why there are gaps in the fossil record.

Describe how mass extinctions have shaped the ecological landscape.