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Kingdom: Archaebacteria
The Extremeophiles
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Characteristics Microscopic Unicellular Cell walls
Prokaryotes (lack a nucleus) Reproduce by binary fission
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3 major groups Methanogens Halophiles: salt lovers
Thermophiles: heat lovers
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Halophiles Great salt Lake
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Thermophiles Heat loving bacteria Live in underwater thermal vents
Live in hot springs, Old Faithful May be descendents of 1st life forms Carry out chemosynthesis instead of photosynthesis
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Methanogens Produce methane gas Anaerobic
Live in gut of cows, humans, land-fills, deep in mud Can be used as an alternative source of energy
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CH4
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Kingdom Eubacteria True Bacteria
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Characteristics Microscopic Unicellular Cell walls
Prokaryotes (lack a nucleus), single circular DNA Reproduce by binary fission Autotrophic (photosynthetic or chemo) or heterotrophic (some are decomposers) Anaerobic, Aerobic or both
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Classification By shape
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Classification By clumping
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Salmonella
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Staph (pimples or boils) lives on skin in nose
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Clostridium botulinum
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Products Fermented By bacteria
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Some vaccines Are produced By bacteria
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Begins digestion of grasses in Ruminants like Cows, sheep, goats Nodules in roots of Legumes contain Nitrogen-fixing Bacteria that change N2 into a usable form (nitrates)
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Type of Bacteria Beneficial Effects Clostridia Production of butanol and acetone from molasses Acetobacter Production of vinegar from alcohol Intestinal bacteria Food digestion; synthesizing of vitamins in human Lactobacilli Production of lactic acid from sugar Aztobacter, nitrobacter Fixation of nitrogen in soils Streptococci, lactobacilli Production of dairy products (cheese, yogurt) Streptomyces Source of antibiotics (streptomycin and erythromycin)
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Pathogenic bacteria
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Diseases Bubonic plague Food poisoning Cholera TB Gonorrhea Leprosy
Syphillis tetaus
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