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Microbes in Aquatic Environment

Microbes in Aquatic Environment
Trickling filter comes under

secondary treatment
tertiary treatment
none of these
primary treatment

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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

Chlorobium
Rhodospirillum
Clostridium
Escherichia

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

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

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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
Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.

greater
lesser
half
approximately equal

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Microbes in Aquatic Environment
Activated sludge undergoes

Tertiary treatment
Primary treatment
any of these
Secondary treatment

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