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Chapter 23

Biology: How Life Works · 8 exercises

Problem 1

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

3 step solution

Problem 3

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

3 step solution

Problem 4

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

9 step solution

Problem 5

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

6 step solution

Problem 6

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

4 step solution

Problem 7

Name three types of fossil.

2 step solution

Problem 8

Explain why there are gaps in the fossil record.

5 step solution

Problem 11

Describe how mass extinctions have shaped the ecological landscape.

5 step solution

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