BIOL 350 Lecture Notes - Lecture 8: Homo Erectus, Hominidae, Stone Tool
10 Oct 2014
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Document Summary
The dominant animal: we are order: primates, family: great apes (hominids), the only species of homo closest relatives-great apes members: orangutans, gorillas, chimpanzees but there were other human species and several lived at the same time. Also relatively hairless free arms could be used for carrying food and offsrping free hands could be used for making tools, communicate through gestures (allowing the. "birth" of sign language) free arms and hands could be used to threaten rivals and hence to present signals that could defuse tense situations, thus reducing risk of injury or death perhaps the beginnings of. Needed bigger brain to be cohesive as our groups become bigger, thus giving your group and advantage over others. Direct correlation between size of neocortex (social intelliegence) and size of group: major early effects of natural selection on humans under a changing climate. More male involvement with parental care, more infant are from extended family.
