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Unformatted text preview: A. 1.5 BYA B. Evolves multiple times C. Allows for the evolution of cellular specialization (i.e. tissues) V. The Cambrian Explosion A. 550 MYA the number of biological orders increases exponentially B. Burgess Shale fossils VI. Geologic Time A. Eons > Eras > Periods > Epochs B. Cambrian explosion occurs at beginning of the Paleozoic Era C. Paleozoic era packed with biological novelty (e.g. formation of bony fish, insect/ plant invasion onto land, etc) D. Mesozoic age of reptiles E. Cenozoic age of mammals VII. Plate tectonics dynamic earth Lecture 2 The origins of life II A. Pangea (Paleozoic) a. Gondwana (Mesozoic) b. Laurasia (Mesozoic) B. Plates associated with geological activity VIII. Mass extinctions A. Three major mass extinctions at beginning of Paleozoic, Mesozoic and Cenozoic eras (other minor mass extinctions occurred) B. Probable cause of Cenozoic extinction meteorite impacting Yucatan Peninsula...
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- Spring '11