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Q. Show the important groups of bacteria?
The important groups of bacteria are:
a) Bacillus: rod-shaped.
b) Coccus: spherical.
c) Coccobacillus: oval-shaped.
d) Aerobes: require atmospheric oxygen for growth, e.g., Acetobacter aceti.
e) Facultative anaerobes: can grow with or without atmospheric oxygen.
f) Obligate anaerobes: do not grow in atmospheric oxygen.
g) Mesophiles: require a temperature below 38°C for growth.
h) Obligate thermophiles: grow between 38°C and 82°C.
i) Facultative thermophiles: grow over a wide range of temperatures covered by mesophiles and obligate thermophiles and below.
j) Psychrophiles: grow fairly well at refrigeration temperatures and some can even grow slowly at temperatures below freezing.
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