CHAPTER 22 NOTES

CHAPTER 22 NOTES - CHAPTER 22 What is Evolution Adaptation...

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CHAPTER 22 Two main ideas: 1. Change over time of the genetic composition of a population 2. Decent of modern organism with modification from preexisting organisms Evolutionary adaptation: Accumulation of inherited characteristics that enhance organisms’ ability to survive in specific environments Pre-Darwinian Theory of Evolution: Lamarck called it Inheritance of acquired characteristics : Bodies of living organisms are modified through the use or disuse of parts These modifications are inherited by offspring This idea turned out to be wrong Darwin and Wallace developed the theory independently. Darwin – voyage of the Beagle Wallace – naturalist in Indonesia Natural Selection: The unequal survival and reproduction of organisms due to environmental forces, resulting in the preservation of favorable adaptations Process “selects” from what is available in the gene pool New characteristics are not created on demand
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CHAPTER 22 NOTES - CHAPTER 22 What is Evolution Adaptation...

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