1
2
3
4
5
100
Optimal 50-60 degrees; hot water, sunny soil
Thermophiles
100
Optimal > 80 degrees; volcanic hot springs 
Hyperthermophiles
100
Cant use O2, poisoned by O2. Do not produce either SOD or Catalase; found in deep muds/lakes
Obligate anaerobes 
100
Relationships are not required for survival (synergism and antagonism)
Non-symbiotic
100
Growth or logarithmic increase in #s. Reproduction is greatest; most metabolically active stage, most sensitive to drugs/poisons/radiation
Log Phase
200
highly reactive and high energy form
Singlet oxygen
200
Converts hydrogen peroxide into water
Peroxidase
200
Can tolerate O2 but don't use it for growth 
Aerotolerant anaerobe
200
bacterial cell division 
Binary fission
200
Metabolic activity slows- # deaths = # new cells
Stationary Phase
300
highly toxic, strips electrons from molecules; SOD will convert to O2 & peroxide
Superoxide
300
the MOST reactive form; formed by ionizing radiation
Hydroxyl Radical
300
Require O2 but only in LOW concentrations
Microaerophile
300
Population doubles with every generation. 1..2..4..8.16..32; exponentials are used to define the # of bacteria after growth
Logarithmic (exponential) Growth
300
# of death > # new cells ; some cells remain viable
Death Phase (logarithmic decline)
400
Highly toxic; consists of catalase and peroxidase
Hydrogen peroxide
400
Requires O2; have SOD and Catalase 
Obligate aerobes
400
Organisms live best in the range of 6-8
pH
400
Time required for a cell to divide (=population doubling time); length of one generation is a measure of the growth rate
Generation time
400
Stages in Growth Curve
Lag, Log, Station, Death
500
converts hydrogen peroxide into water & oxygen
Catalase
500
Can use O2 if present (can switch to anaerobic respiration or fermentation if no O2 is present); usually have SOD and Catalase 
Facultative anaerobes
500
Organisms live in a close nutritional relationship (Mutualism, Commensalism, Parasitism)
Symbiotic
500
Little or no cell division ; metabolic activity increasing to prepare for cell division 
Lag Phase
500
Three resistances of Microbial form
High, moderate, and low
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