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Microbes in Aquatic Environment

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

Escherichia
Rhodospirillum
Clostridium
Chlorobium

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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.

approximately equal
lesser
greater
half

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Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Primary treatment
Secondary treatment
Tertiary treatment

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

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

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

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

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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.

approximately equal
greater
half
lesser

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