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Chapter 12

Human Brain - Chapter 12.docx

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Ted Petit

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Chapter 12Humans Human Brain and Evolution Evolution of Humans1859Charles Darwinall living creatures are subject to selectionphysical and beh changes due to selection pressure little doubt that humans have been and coninue to be subjected to evolutionary forcesevolutionary psychology attempts to apply the principles of adaption and selection to human beh increasing in pop o provides us with a means by which we can integrate our beh with our prehistory and gain profound insights into what it means to be human we do not like to think of ourselves as animalsand as being subject to the laws of natureEvolution Theory Charles Darwin and Alfred Russel WallaceJuly 1 1858both developed the theory independently naturalists w interests in geologyDarwinHMS Beaglefascinated by how species emerged and how geographic isolation on islands produced such a variety of features in what he presumed were the same species Wallacerelationship btwn specific geographic locations and their effects on specific characteristics of the species that inhabited that nicheo sent his paper to Darwin which confirmed his theory of evolution on the origins of species 1859Darwinboth are credited with discovering he principles of natural selection but cited other in the production of the theory of evolution 1 classification of organisms based on structureCarolus Linnaeus commonalities in structure of related species2 Charles Lyell and William smith geologistsearth far older than thoughtLyellsome species hardly change some extinctsmitherosion volcanism 3 Thomas Malthusfood supplies affect populationa pop grow exponentially until they surpass their food supplyHistorical Theory of Evolution the original theory of evolutionvariation inheritance differential reproductionall individ varydiff in morphologydiff can be passed from gen to gen these diff is morphologyresult in variations in success in the envirosurvival and reproduction Darwinmechanism underlying these changesnatural selectiono all individ are unique and that characteristics that give an animal a reproductive adv will result in the magnification of these traits in the population when a trait results in a reproductive advantage and is selected foradaptation must be inherited from one generation to the nextdiff enviro may result in the selection of diff traits because the environment is not static and variation never truly goes away natural selection must be continually occurring
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