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Archaea
Most cells look similar to bacterial cells; most divide by binary fission; few bud or fragment; no known pathogens
Archaea MYTHS/MISCONCEPTIONS
Ancestral to bacteria; are all extremophiles; difficult to grow in lab; rare and relatively unimportant
Physiological divisions of Archaea
Hyperthermophiles; Methanogens; Halophiles
Hyperthermophiles
Archaea; Grow at temps above 80 degrees Celsius; found in oceans and hot springs
Methanogens
Archaea; Strictly anaerobic, create methane; converts CO2 into CH4
Halophiles
Archaea; Thrive in salt concentrations greater than 25%; slow growing