Evolution - The Science of Zoology Includes the study of...

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The Science of Zoology Includes the study of animals and protistans. amoeba Feather duster worms
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Questions about animal life grouped into two categories: 1. Proximate causes - Functioning of biological systems. Uses the experimental (scientific) method. 2. Ultimate causes - How did biological systems arise? Involves the evolutionary sciences and the comparative method (mainly)
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EVOLUTION AND NATURAL SELECTION Understanding evolution and natural selection is important to understanding the origin of animals. Yellow backed oriole Evolution - Any change in the gene pool of a population over time.
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Natural Selection - Process by which evolution may have occurred. Army ants on the move Aristotle - Proposed the idea of a fixed number of species.
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Evidence for evolution: Fossils Geological time
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Fossils- Any preserved remains of past life on Earth
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Geological time- Age of the earth based on ordered layers of sedimentary rock. Charles Lyell established principle of uniformitarianism in his book, Principles of Geology (1830’s).
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radiometric dating methods - Determine age of rocks based on radioactive decay of certain elements. 1. Potassium-40 to argon-40- half life of potassium-40 is 1.3 billion years.
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of uranium-235 is 713 million years. Assumes equal amounts of lead-204
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Evolution - The Science of Zoology Includes the study of...

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