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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

Clostridium
Escherichia
Rhodospirillum
Chlorobium

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

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

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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

approximately equal to
lesser
greater
half

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Microbes in Aquatic Environment
Coliforms are used as indicator organisms because

None of these
a testing procedure with great specificity is easy to perform
both (a) and (b)
they are present wherever enteric pathogens are present

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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.

half
lesser
approximately equal
greater

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

Tertiary treatment
Primary treatment
None of these
Secondary treatment

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