BISC%20300.Chap.01.NOTES

BISC%20300.Chap.01.NOTES - BISC 300 Introduction...

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BISC 300 Introduction &Chapter 1 Notes Evolution, Microbial Life, and the Biosphere Prokaryotes on Earth A. How many? Compare to number of people: USC Undergraduate Population: 16,000 1.6 X 10 4 California Population: 36,000,000 3.6 X 10 7 United States Population: 300,000,000 3.0 X 10 8 World Population: 6,600,000,000 6.6 X 10 9 World Prokaryotic Population: 5,000,000,000,000,000,000,000,000,000,000 5.0 X 10 30 This equals 50% of the world's bioavailable CARBON. Same amount of carbon as in plants. 10 times the as much bioavailable nitrogen and phosphorus as plants. B. Where do they live? Different environments of prokaryotes: On Humans : Skin: 10 3 -10 4 cells/cm 2 6 /cm 2 = 3.0 X 10 8 Colon: 3.2 X 10 11 /g 7.0 X 10 13 total Air: Detected as high as 57-77 km (34-46 mi) high, clouds = 5.0 X 10 19 cells Animals : Humans (4 X 10 23 cells), Domestic animals, Termites = 5.0 X 10 24 cells Soils : Forests, Grassland, Desert, Tundra, Swamps = 2.5 X 10 29 cells Aquatic : Marine and Freshwater 10 4 -10 7 cells/ml
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BISC%20300.Chap.01.NOTES - BISC 300 Introduction...

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