3-31 Notes

3-31 Notes - ingestion Evolution of predator prey...

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Notes 3-31-08 Homosapiens: Ethiopia; 160K-195K thousand years ago Evidence: mitochondrial DNA; passed from mother to child; been able to trace back 150K-200Kyears ago 3 Components to Cultural Evolution o Nomads: early on we were nomadic; hunter-gatherers; 2 million years ago, fossil records show that we started using tools and show the first division of labor; o Agriculture: evidence is in Africa, Eurasia, Americas; by 10K years ago evidence of the first cities o Industrial Revolution: 1700s; Earth’s new crisis: Pg 374; extremely high extinction rate due to habitat destruction Animal: heterotrophic, multicellular, eukaryotic organisms that obtain nutrients by
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Unformatted text preview: ingestion Evolution of predator prey relationships provided major reasons for natural selection Cambrian explosion Figure 17.6: 9 phyla o Sponges o Cnidarians Figure 17.11 True carnivores Marine Radical symmetry Jellies, sea anemones Gastrovasicular cavity o Flatworms Blood Fluke: Free-living Tape worms o Roundworms First phyla with a complete gut (stuff comes in one end goes out another) o Annelids o Arthropods o Mollusks o Echinoderms o Chordates...
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This note was uploaded on 04/08/2008 for the course BISC 104 taught by Professor ? during the Spring '06 term at Ole Miss.

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3-31 Notes - ingestion Evolution of predator prey...

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