14-28 - Based on genetic or morphological evidence Related...

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Anthropology lecture notes 31.3.09 Macroevolution and the Early Primates Macroevolution = evolutionary change that creates new species How do species originate? Species – a complicated concept o Species consist of individuals that can interbreed and produce fertile offspring o Not applicable to single-cell organisms o Issues caused by human intervention o Hard to apply to extinct animals Species most commonly originate through isolation Speciation inception of new species Non-directedness of evolution 2 types of speciation o Cladogenesis o Anagenesis Rates of speciation o Phyletic gradualism o Punctuated equilibrium Phylogenetics The study of evolutionary relationships among groups of organisms
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Unformatted text preview: Based on genetic or morphological evidence Related to taxonomy Ancestral and derived traits Phylogenetic tree o Shows evolutionary relationship among species o The last common ancestor Early mammals Very little evidence exists for the earliest primates Mostly teeth Teeth are very informative Mammals were preadapted to take over o Homeothermal o Developed senses of smell and hearing from being nocturnal o Nocturnal = night main period of activity o Diurnal = opposite of nocturnal Arboreal hypothesis evidence for large forests...
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This note was uploaded on 04/18/2011 for the course ANTH 105 taught by Professor Tankosic during the Winter '09 term at Indiana.

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14-28 - Based on genetic or morphological evidence Related...

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