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An Overview of Animal Diversity

Chapter 32. An Overview of Animal Diversity. Questions prepared by William Wischusen Louisiana State University Michael Dini Texas Tech University. You discover a new organism, a multicellular eukaryote that is heterotrophic. Discuss how to best classify this organism.

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An Overview of Animal Diversity

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  1. Chapter 32 An Overview of Animal Diversity Questions prepared by William WischusenLouisiana State University Michael DiniTexas Tech University

  2. You discover a new organism, a multicellular eukaryote that is heterotrophic. Discuss how to best classify this organism.

  3. Land animals could be considered to have been common before the time of the • Cambrian explosion. • Cenozoic era. • Ediacaran biota. • Neoproterozoic era.

  4. What should animals with radial symmetry be better able to do than those with bilateral symmetry? • move quickly in one direction • detect threats from above or below equally well • deal effectively with food distributed homogeneously in 360° • focused attention in a single direction

  5. Bilateral symmetry is LEAST associated with • cephalization. • the presence of mesoderm. • an active lifestyle. • a nervous system with sensory structures concentrated at one end of the animal. • the sessile condition.

  6. What is true of modern animal phylogenies? • They take no account of an animal’s “body plan.” • They portray an animal’s place on the scale of nature (scala naturae). • They rely solely on molecular (genetic) data. • They are hypothetical. • They are immune from error due to homoplasy.

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