1. Click to edit Master title style Click to edit Master subtitle style CLICKER QUESTIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson © 2011 Pearson Education, Inc. An Overview of Animal Diversity Chapter 32 Questions prepared by William Wischusen Louisiana State University Michael Dini Texas Tech University

2. © 2011 Pearson Education, Inc. You discover a new organism, a multicellular eukaryote that is heterotrophic. Discuss how to best classify this organism.

3. © 2011 Pearson Education, Inc. Land animals could be considered to have been common before the time of the a)Cambrian explosion. b)Cenozoic era. c)Ediacaran biota. d)Neoproterozoic era.

4. © 2011 Pearson Education, Inc. What should animals with radial symmetry be better able to do than those with bilateral symmetry? a)move quickly in one direction b)detect threats from above or below equally well c)deal effectively with food distributed homogeneously in 360° d)focused attention in a single direction

5. © 2011 Pearson Education, Inc. Bilateral symmetry is LEAST associated with a)cephalization. b)the presence of mesoderm. c)an active lifestyle. d)a nervous system with sensory structures concentrated at one end of the animal. e)the sessile condition.

6. © 2011 Pearson Education, Inc. What is true of modern animal phylogenies? a)They take no account of an animal’s “body plan.” b)They portray an animal’s place on the scale of nature (scala naturae). c)They rely solely on molecular (genetic) data. d)They are hypothetical. e)They are immune from error due to homoplasy.