填空题
acquiredadaptations brutalextendshabitatsimageliterallyrefined speculate thriveJustbecausetheycan'tsingoperaorrideabicycledoesn'tmeanthatanimalsdon'thaveculture.There'snobetterexampleofthisthankillerwhales.Asoneofthemost__1__predators（食肉动物）,killerwhalesmaynotfitthe__2__ofaculturedcreature.However,thesebeastsoftheseadodisplayavastrangeofhighly__3__behaviorsthatappeartobedrivingtheirgeneticdevelopment.Theword"culture"comesfromtheLatin"colere,"which__4__means"tocultivate."Inother words,itreferstoanythingthatis__5__orlearnt,ratherthaninstinctiveornatural.Amonghuman populations,culturenotonlyaffectsthewaywelive,butalsowritesitselfintoourgenes,affecting whoweare.Forinstance,havingspentmanygenerationshuntingthefatmarinemammalsofthe Arctic,theEskimosofGreenlandhavedevelopedcertaingenetic__6__thathelpthemdigestand utilizethisfat-richdiet,therebyallowingthemto__7__intheircoldclimate.Likehumans,killerwhaleshavecolonizedarangeofdifferent__8__acrosstheglobe,occupying everyoceanbasinontheplanetwithanempirethat__9__frompoletopole.Assuch,different populationsofkillerwhaleshavehadtolearndifferenthuntingtechniquesinordertogaintheupperhandovertheirlocalprey（猎物）.This,inturn,hasamajoreffectontheirdiet,leadingscientiststo__10__thattheabilitytolearnpopulation-specifichuntingmethodscouldbedrivingtheanimals,geneticdevelopment.
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