PSYC 2000 Lecture : Lecture 5
Document Summary
The big three did not happen at the same time. At least two questions about the skeletal adaptations for bipedality. Feet: obligate bipeds do not have an opposable toe. Most of the sites (4/5 are in the matching: remember the format! Freeing hands: better view of open cuontry, energy efficiency. Sahelanthropus tchadensis: 6-7 mya [oldest known fossil, central africa. "mix" of ancestral and derived traits: nearly complete skeleton, probably bipedal, but still maintained some adaptations for arborial. "spoiler!: nearly complete skull that has features that are more human like. It makes it a better canidate for a human ancestor. Most of the specific information are going to come to you in the form of comparisons. Compare australopithecus anything to homo anything: geography, cranial traits, postcranial traits. There is one question that asks you to compare the robust vs. gracile austrulabithasenes. Why is lucy important and what is her genus and species. Taung makes a great comparison question to selam: gahri.
