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Macroevolution: Processes of Vertebrate and Mammalian Evolution Chapter 5
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How old is the human species? Darwin’s Dangerous idea @8:45@8:45
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The Earth is 4.6 Billion years old Australopith icus afarensis 3- 1.8mya Homo habilis 2.1- 1.6mya Homo erectus 1.8- 0.3mya Homo sapien sapiens 92,000ya Homo sapien sapiens 22,000ya
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Million Years Ago Australopithicus africanus 3.03-2.04 mya
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Geological Eras largest category Paleozoic Vertebrates appeared 500 mya. Mesozoic Reptiles were dominant land vertebrate, placental mammals appeared 70 mya. Cenozoic Divided into Tertiary and Quaternary periods and 7 epochs.
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EPOCHS SMALLEST CATEGORY Smallest category of the geological time scale. In the Cenozoic, epochs include Holocene Pleistocene Pliocene Miocene Oligocene Eocene Paleocene
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Geological Time Scale The organization of earth history into eras, periods, and epochs; commonly used by geologists and paleoanthropologists.
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Fossils of Mesosaurus, a freshwater reptile living during the Paleozoic Era, have been found in both Brazil and South Africa WHY?
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Early Permian period 300mya (in the Paleozoic Epoch)
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Permian 225mya Jurassic 150mya Cretaceous 65mya Today Continental Drift The movement of continents on sliding plates of the earth’s surface. As a result, the positions of large landmasses have shifted drastically during the earth’s history.
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Africa South America India Australia Antarctica FOSSIL EVIDENCE LYSTROSAURUS GLOSSOPTERIS MESOSAURUS CYNOGNATHUS
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PLATE TECTONICS
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