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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?

Clostridium perfringens
E.coli
Fecal Streptococci
All of these

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

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

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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
approximately equal to
lesser
half

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

None of these
Secondary treatment
Primary treatment
Tertiary treatment

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Microbes in Aquatic Environment
Activated sludge undergoes

Tertiary treatment
any of these
Primary treatment
Secondary treatment

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Microbes in Aquatic Environment
The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.

lesser
approximately equal
greater
half

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