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GEL 113 Homework 16 Answer sheet Chapter 16: Extinction Part I: True or False: 1.F 2.T 3.T 4.F 5.F 6.F 7.T Part II: Multiple Choice: 1.C 2.D 3.A 4.A 5.C Part III: 1. A Mass Extinction is and extinction event that affects diverse groups of organisms living in a variety of habitats. 2. Physical evidence for the bolide collision at the end of the Cretaceous includes: iridium spike, shocked quartz, microtektites, tsunami deposits, fern spike, fossil soot, and the Chicxulub crater. 3. On average, a civiliztion-destroying bolide collision occurs roughly once every 300,000 years. 4. Plants adapted to undergoing a dormant period would have a good chance of survival. Terrestrial ectotherms would have a good chance of survival if they were not herbivores, as would small omnivorous endotherms which would eat almost anything, including things still available during the impact winter such as seeds, nuts, grubs, insects and other small vertebrates that eat such things. Many insectivores and fish-eaters would also be able to find enough food. |