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Evolution and Biodiversity: Origins, Niches, and Adaptations

Evolution and Biodiversity: Origins, Niches, and Adaptations. G. Tyler Miller’s Living in the Environment 13 th Edition Chapter 5. Dr. Richard Clements Chattanooga State Technical Community College. Key Concepts. Origins of life. Evolutionary processes . Ecological niches.

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Evolution and Biodiversity: Origins, Niches, and Adaptations

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  1. Evolution and Biodiversity: Origins, Niches, and Adaptations G. Tyler Miller’s Living in the Environment 13th Edition Chapter 5 Dr. Richard Clements Chattanooga State Technical Community College

  2. Key Concepts • Origins of life • Evolutionary processes • Ecological niches • Species formation • Species extinction

  3. Origins of Life • Chemical evolution • Biological evolution Fig. 5-2 p. 96; Refer to Fig. 5-4 p. 98

  4. Evolution and Adaptation • Macroevolution • Microevolution • Gene pool Refer to Spotlight p. 99 • Mutation • Natural selection • Gene flow • Genetic drift

  5. Natural Selection • Differential reproduction • Adaptive trait • Directional selection • Stabilizing selection • Diversifying selection Fig. 5-5 p. 101 • Coevolution Refer to Fig. 5-6 p. 102

  6. Ecological Niches and Adaptation • Ecological niche • Fundamental niche • Habitat • Realized niche Fig. 5-7 p. 104

  7. Broad and Narrow Niches • Generalist species • Specialist species Refer to Spotlight p. 105

  8. Speciation, Extinction, and Biodiversity Fig. 5-8 p. 105 • Speciation • Geographic isolation • Reproductive isolation

  9. Extinction • Background extinction • Mass extinction • Adaptive radiation

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