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2/23/2010 lab exam

Bio 108 Lab exam one

QuestionAnswer
Origin of the Earth 4600 mya
Cambrian Explosion 525 mya (beginning of modern life)
Permian Mass Extinction 251 mya (paleozoic mesozoic boundary)
Cretaceous Mass Extinction 65.5 mya (mesozoic cenozoic boundary)
First Fossils (prokaryotes) 3500 mya
Created by: 502582323
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