TheevolutionofintelligenceamongearlyElargemammalsofthegrasslandswasduein特殊短语greatmeasuretotheinteractionbetweentwoecologicallysynchronizedgroupsoftheseani-(5)mals,≠,ledtoageneralimprovementinbrainfunctions;how-转折词ever,ponentsofintelligencewereTS(10)-playofincreasinglysmartercatchersandSEincreasinglykeenerescapersisdefinedbyattention—thataspectofmindcarryingcon-(15)sciousnessforwardfromonemomenttothe略读(解释),free-floatingawarenesstoahighlyfocused,,2,3Therangethroughthesestatesismediatedbythearousalsystem,anetworkoftractsconverg-特殊词汇(20),,more↑上升vigilant;thisincreasedvigilanceresultsinthe特殊词汇(25)esmoresensitivetoitssur--,withafloodingofimpulsesinthe(30)brainstem;,thehold--genceisthewayinwhichtheseimagesandotheralertlysearchedinformationareusedinthecon-(35)-(40)etogethermarvelouslytoproducedif-SE,+≠andcarnivoresdevelopdifferentkindsofatten-,arousalstimulatesthe(45)productionofadrenalineandnorepinephrinebytheadrenalglands,theeffectinherbivoresispri-marilyfear,whereasincarnivorestheeffectis⊙,﹥﹤,(50)experienceforethoughtasweknowit,
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