ANTHROP 2200H Chapter Notes - Chapter 10: Kenyanthropus, Stone Tool, Reverend Lovejoy
19 Aug 2016
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Chapter 10: early hominin origins and evolution: what is a hominin, bipedal locomotion: getting around on two feet. Legs: long relative to body trunk and arms. Foot: longitudinal arch: nonhoning chewing: no slicing, mainly grinding. More emphasis on front portion of face muscles to provide greater vertical force in crushing food. Did not need big canines for hunting and defense. Big brains = language: peter rodman and henry mchenry"s patchy forest hypothesis. Bipedality related to greater efficiency of walking on two feet rather than four feet (to pick up food: owen lovejoy"s provisioning hypothesis. A monogamous father enhanced the survival of the mother and offspring by providing both food and protection from predators. Required male to have free hands for carrying food: sexual dimorphism and human behavior. Relatively little sexual dimorphism in body size in comparison to apes. Anthro 2200h: bipedality had its benefits and costs: an evolutionary trade-off. Exposure to predators; back injury; enormous burden on.
