ANT 201 Chapter Notes - Chapter 6: Homo Heidelbergensis, Homo Habilis, Homo Erectus
11 Dec 2016
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4: ape foundations, human revolution: ape evolution and behavior, arboreal predatory niche: depth perception, enlarged optic nerve, sexual dimorphism, miocene: new radiation --> all sorts of apes. ** diff in nonprotein-coding functional rna: social interactions vary among diff species, ape brains evolving. Primates: strong relationship b/w group size and ratio of neocortex to rest of brain: marked diff b/w regression lines for monkeys and hominoids reflect grade shift in relationship. Higher ration for all hominoids than for monkeys. Variation in neocortical ratio due to life span and group size. Ratio of cerebral white to gray matter increases with overall brain size. Tool making; digging out termites with twigs; weaponry. Bipedal: freeing of hands; less body surface to sunlight, sexual display of body, less energy: may have had ability of toolmaking, homo rising. Division of labor by sex/ pair bonding: males obtain sexual favors by bringing meat. Homo habilis: likely stone toolmaker and direct human ancestor.
