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Exploring Animal Diversity: A Classification Overview

Discover the classification of a new organism, a multicellular eukaryote that is heterotrophic. Learn about the significance of radial and bilateral symmetry in animal behavior and evolution, as well as insights into modern animal phylogenies. Delve into the history of land animals and the eras they thrived in.

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Exploring Animal Diversity: A Classification Overview

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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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