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Transcript
Chapter 16 Foundations of Biology Evolution Notes Objective: Students will be able to explain how organisms change over time. Darwin is recognized as being one of the first scientists to describe a mechanism, or explanation, for how organisms change over time. KEY TERMS: Evolution: The process of change over time Adaptation: Any heritable trait that helps an organism survive in its environment Fitness: Describes how well an organism can survive and reproduce in its environment, ie: more fit mean more likely to survive and reproduce Species: Organisms that can mate with each other and produce fertile offspring Artificial Selection: Humans selecting traits they find useful in an organism and breeding those organisms to produce the desired trait Natural Selection: Mechanism for evolution presented by Darwin 5 Tenets of Natural Selection 1. 2. 3. 4. 5. Variations exist in a population Some variations are favorable in a particular environment Those individuals with the favorable variation survive and reproduce More young are produced than can survive in a population Over long periods of time populations change
