1. History of Life Ch.14

2. (14-1) Biogenesis All living things come from other living things –Proved by Pasteur Spontaneous generation: living things arise from nonliving things –Ex: maggots from rotting meat

3. Redi’s Experiment

4. Spallanzani’s Experiment

5. Pasteur’s Experiment

6. (14-2) Earth’s History Earth ~4 billion years old –Determined by radiometric dating Early conditions much different than now

7. Miller-Urey Experiment

8. (14-3) Roles of RNA Rybozyme: RNA catalyst found in some unicellular organisms –Promotes own replication –Discovered by Thomas Cech (1980s) RNA also aids in DNA replication & protein synthesis

9. 1 st Life Forms Prokaryotes (~3.5 bya): no nucleus, unicellular –Chemosynthetic & anaerobic –Photosynthetic & aerobic Eukaryotes (1.5-2 bya): nucleus, multicellular

10. Endosymbiosis Mutually beneficial relationship b/w 1 organism & another living w/in it