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Microbes in Aquatic Environment

Microbes in Aquatic Environment
Which of the following species in water reveal the presence of fecal pollution of human or animal origin?

Fecal Streptococci
E.coli
All of these
Clostridium perfringens

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Microbes in Aquatic Environment
Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except

Rhodospirillum
Escherichia
Chlorobium
Clostridium

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Microbes in Aquatic Environment
The sulfur pearl of Namibia, Thiomargarita namibiensis

is the worlds smallest bacterium
Both (a) and (b)
is the worlds largest bacterium
stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume

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Microbes in Aquatic Environment
The amount of oxygen dissolved in hypolimnion water in the winter is __________ to/than the amount of oxygen dissolved in hypolimnion water in the summer

greater
lesser
half
approximately equal to

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Microbes in Aquatic Environment
All of the following species are considered coliforms except

Escherichia coli
Enterobacter aerogenes
Salmonella typhi
Klebsiella pneumoniae

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Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Primary treatment
Tertiary treatment
Secondary treatment

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