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Chapter 5

Chapter 5. Macroevolution: Processes of Vertebrate and Mammalian Evolution. How old is the human species?. Darwin’s Dangerous idea @8:45. The Earth is 4.6 Billion years old. Homo sapien sapiens 92,000ya. Homo erectus 1.8-0.3mya. Homo sapien sapiens 22,000ya.

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Chapter 5

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  1. Chapter 5 Macroevolution: Processes of Vertebrate and Mammalian Evolution

  2. How old is the human species? Darwin’s Dangerous idea @8:45

  3. The Earth is 4.6 Billion years old Homo sapien sapiens 92,000ya Homo erectus 1.8-0.3mya Homo sapien sapiens 22,000ya Australopithicus afarensis 3-1.8mya Homo habilis 2.1-1.6mya

  4. Australopithicus africanus 3.03-2.04 mya Million Years Ago

  5. Geological Eraslargest 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.

  6. epochssmallest category • Smallest category of the geological time scale. • In the Cenozoic, epochs include • Holocene • Pleistocene • Pliocene • Miocene • Oligocene • Eocene • Paleocene

  7. Geological Time Scale The organization of earth history into eras, periods, and epochs; commonly used by geologists and paleoanthropologists.

  8. Fossils of Mesosaurus, a freshwater reptile living during the Paleozoic Era, have been found in both Brazil and South Africa WHY?

  9. Early Permian period 300mya (in the Paleozoic Epoch)

  10. Continental Drift Today Cretaceous 65mya Jurassic 150mya Permian 225mya 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.

  11. FOSSIL EVIDENCE LYSTROSAURUS India Africa South America Australia Antarctica CYNOGNATHUS MESOSAURUS GLOSSOPTERIS

  12. Plate tectonics

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