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Lecture 05 (1-30) - Macroevolution Processes of Vertebrate...

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Macroevolution: Processes of Vertebrate and Mammalian Evolution The Human Place in the Organic World Principles of Classification Definition of Species Vertebrate Evolutionary History: A Brief Summary Mammalian Evolution The Emergence of Major Mammalian Groups Processes of Macroevolution Classification is used to order organisms into categories to show evolutionary relationships. Example - human classification Kingdom: Animalia Subkingdom: Metazoan Phyla: Chordata Subphyla: Vertebrata Class: Mammalia Classification: Definitions Metazoa Multicellular animals. Chordata The phylum of the animal kingdom that includes vertebrates. Vertebrates Animals with segmented bony spinal columns; includes fishes, amphibians, reptiles, birds, and mammals. Principles of Classification The field that specializes in establishing the rules of classification is called taxonomy . Organisms are classified first on the basis of physical similarities. Basic physical similarities must reflect evolutionary descent in order for them to be useful. Homologies Similarities based on descent from a common ancestor.
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