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Unformatted text preview: Sexual dimorphism: differences between males and females of same species Hominoids (apes): lack of a tail, large body size. Compared with monkeys: larger brain relative to body size, more flexible cognitive and behavioral repertoire, elaboration of social structure. Hominins Australopithecus afarensis : Lucy. Found in Tanzia, Central Africa and South Africa. Believed to have large sexual dimorphism. Size small relative to humans. Shows signs habitual bipedalism. Homo habilis : large brain, short and broad cranium, human like teeth. Used oldowan tools. Homo rudolphensis : larger brain, large teeth, used oldowan tools. More human like proportions. Homo erectus : first species that leaves Africa. Used Acheulian tools, associated with controlled fire and navigation....
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- Spring '10