Bio1_24_EvolutionIV - 1 2 3 1 2 4 5 1 2 6 7 8 9 10...

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Self-Quiz 1. What 2 models describe the patterns of macroevolution? How do they differ? 2. What genes affect the development of animals? 3. What structures of an organism are most likely to fossilize? Why? 4. What evolutionary development allowed oxygen to accumulate in the atmosphere? In what organisms did this innovation originate? 5. When did plants & animals invade land? What adaptations allowed for the invasion of land? Overview • Ch. 18: History of Life – Section 18.3: Continental drift – Systematics – Phylogenetic trees – Three-domain system Continental Drift • Continents are not fixed • Geological structures – E.g., South America-Antarctica-Australia mountain range • Biogeography – Pangean distribution: mammal-like reptiles – Gondwanan distribution: ratites, seed ferns – Marsupials Continental Drift • Plate tectonics – Seafloor spreading •Ocean ridges – Subduction zones •Ocean trenches – Transform boundaries Continental Drift • Pangea – Permian/Triassic supercontinent • Gondwana – Cretaceous southern continent • Laurasia – Cretaceous northern continent Assignment 1 • Think, Pair, Share • Topic: Would you expect to find dinosaur fossils on all of the modern continents? Why or why not? History of Life: Paleozoic Era • Cambrian to Permian extinction History of Life: Mesozoic Era History of Life: Cenozoic Era • Angiosperms & mammals dominant Extinction • Extinction: irrevocable loss of species • Mass extinctions: many lineages
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This note was uploaded on 01/12/2012 for the course BIOLOGY 1 taught by Professor Teresafinnern during the Fall '11 term at Riverside Community College.

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Bio1_24_EvolutionIV - 1 2 3 1 2 4 5 1 2 6 7 8 9 10...

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