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Chapter 5 Anthro notes

by: Brenna Graham

Chapter 5 Anthro notes 201g

Brenna Graham
GPA 3.9

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About this Document

Basic human evolution
Introduction to Anthropology
Dr. Kelly jenks
Class Notes
25 ?




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This 2 page Class Notes was uploaded by Brenna Graham on Saturday September 17, 2016. The Class Notes belongs to 201g at New Mexico State University taught by Dr. Kelly jenks in Fall 2016. Since its upload, it has received 23 views. For similar materials see Introduction to Anthropology in Cultural Anthropology at New Mexico State University.


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Date Created: 09/17/16
Chapter 5 Notes  Apes appeared and developed between 23­5 mya Homnin appear 5 mya Climate change may have added pressure for Habitual bipedalism­ where bipedalism is more common than not Most ancestors  found in South Africa and eastern Africa along the great rift valley and Chad Dating methods Stratigraphy­ dating when a fossil lived relative to the layers of dirt around them. Potassium­argon dating­ using volcanic ash to specifically date when the ash on the fossils were  deposited by how much an isotope has degraded Primary Deposits­Where a fossil was originally and where they lived and died\ Secondary Deposits­where the fossils are moved by natural /cultural processes and are very  unreliable for dating methods. Caves in south America is a great source of fossils but is hard to date fossils  Bipedalism­ earliest derived trait for hominins is walking on two legs Mosaic Evolution­ the evolution of different body parts at different speeds. Bipedalism­ needs short bowl shaped pelvis, big toe doesn’t diverge, s shaped spine, angled in  femur, arched feet Savvannah theory­ bipedalism evolved to allow carrying stuff, easier to see food and danger,  cool body, energy efficient BUT bonobos are bipedal but live in forests Hominins lived in forests No abrupt climate change occurred Long annoying list of early hominins here.


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