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Instructor Overview

By the end of this section, you will be able to:

  • Describe the features that characterized the earliest animals and when they appeared on earth
  • Explain the significance of the Cambrian period for animal evolution and the changes in animal diversity that took place during that time
  • Describe some of the unresolved questions surrounding the Cambrian explosion
  • Discuss the implications of mass animal extinctions that have occurred in evolutionary history