Topic%2013_The%20Great%20Dying - Each dot on your cladogram...

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My name is: _____________________ A. Questions on The Great Dying , by Stephen J Gould (Available on the internet) 1. What fraction of marine families that disappeared at the end of Permian time ? 2. List some common paleozoic fossils that went extinct or were greatly diminished in the End permian extinction. 3. What happened in terms of paleogeography in late Permian time? 4. Gould stresses two things we need to know about the Permian extinction and the fossil record in general: A) What type of organisms were primarily affected by the extinction? B) The fossil record is strongly biased toward what type of marine life? 5. Why did the formation of Pangea eliminate much of the area of the shallow seas? ____________________________________________________________________________________________________________________ B. Our Fossil Family Tree On a separate sheet, draw a cladogram showing the development of our family tree up to the Permian extinction.
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Unformatted text preview: Each dot on your cladogram indicates a common ancestor. Show groups not directly in our line as branching away from the common ancestor points. Here are our common ancestors in alphabetical order: ANIMALS, AMNIOTES, BILATERA, CHORDATA, CYNODONTS, EUKARYOTES, JAWED_VERTIBRATES, LOBE-FINNED_FISH, MAMMALS, SYNAPSIDS, TETRAPODS, THERAPSIDS, THERIODONTS Here are other groups that are not in our direct line: PLANTS, FUNGI, DIATOMS, MOSS, FORAMS, ALGAE, JELLY FISH, SPONGES, WORMS, BRYOZOANS, MOLLUSCS, BRACHIOPODS, STARFISH, GRAPTOLITES, LAMPREYS, OSTRACODERMS, AGNATHANS, SHARKS, PLACODERMS, RAY-FINNED FISH, AMPHIBIANS, DIAPSIDS, TURTLES. At each point of common ancestry, put a geological symbol indicating the geological age in which the common ancestor may have first evolved based on the oldest known fossils of the group....
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This note was uploaded on 08/23/2009 for the course GEOL 102 taught by Professor Kennethsprenke during the Fall '09 term at Idaho.

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