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BIOLOGY 1M03 (677)
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1MO3_Chapter 12.docx

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Department
Biology
Course
BIOLOGY 1M03
Professor
Jon Stone
Semester
Winter

Description
From Hominin to Homo Early HomoOrigins of Homo o 23 mya o Africa o Larger brains o Smaller teeth o Australopithecus limb proportions o Rapid development Homo habilis1423 myr o East and South AfricaTaxonomic diversity o Homo rudolfensi Climate The Pleistocene epoch started 18 mya and involved a cooling trend that started within the past 6 myHomo ergasterEvolved from early Homo0618 myaKNMER 3733Homo erectusMorphologyH ergaster skullAncestral postorbital constriction no chin receding foreheadDerived less prognathic larger brain smaller jaws and teethUnique brow ridge occipital torus Postcrania o Long legs narrow hips barrel chest o Modern human body proportions o Reduced sexual dimorphism o Language limited o Terrestrial biped runnerHomo ergasterTools and SubsistenceBetween 16 and 14 mya H ergaster improved on Oldowan tools and added the stone biface a Mode 2 technological innovation that was part of the Acheulean industry standardised specifications consistent for almost 1 myAxes could have been used to butcher animals to dig up tubers or water to strip bark from trees as projectiles to hurl at animals or people or to generate flake
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