Ch 27 - Bacteria and Archaea (1 slide per page)-1

Thermophiles thrive in very hot environments eg

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Unformatted text preview: new discoveries and descriptions occur regularly • Many extremophiles but also many that live in “normal conditions Extreme thermophiles: •Thrive in very hot environments e.g. Yellowstone geysers e.g. Oceanic hydrothermal vents Enzymes work in extreme conditions possibly useful for industry. 39 Archaea Diversity Halophiles: • Survive in very high salinity • Some die in low salinity Methanogens: Acidophiles: • Use CO2 to oxidize H2. • Release methane (CH4) • marsh gas. •O2 very toxic • Recently discovered group (2006) • Smallest organisms known Bacteria 40 How many species? ~9000 named/described so far however…………….. Probably millions!!! 400 spp 500 spp 41 Bacteria How abundant? 10 trillion skin cells 1 trillion on skin Enterococcus Faecium Bacteria on Human Skin 42 Bacteria How abundant? 10 trillion skin cells 100 trillion in GI tract Staphylococcus aureus Bacteria adhering to nasal cilia Bacteria 43 How abundant? Billions! Bacteria 44 How abundant? Contain: 50% carbon 90% Nitrogen 90% Phosphorous found in a...
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