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Microbes in Aquatic Environment

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

Salmonella typhi
Escherichia coli
Klebsiella pneumoniae
Enterobacter aerogenes

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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

half
lesser
approximately equal to
greater

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Microbes in Aquatic Environment
Activated sludge undergoes

Primary treatment
any of these
Secondary treatment
Tertiary treatment

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Microbes in Aquatic Environment
Removal of solids is generally considered as a

None of these
Primary treatment
Secondary treatment
Tertiary treatment

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Microbes in Aquatic Environment
The Redfield ratio is an index of concentration of

carbon, nitrogen and phosphorous
nitrogen, potassium and iron
carbon, hydrogen and oxygen
carbon, phosphorous and sulfur

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

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

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