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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

Chlorobium
Escherichia
Rhodospirillum
Clostridium

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Microbes in Aquatic Environment
Chemical precipitation of phosphorus is

both (a) and (b)
primary treatment
secondary treatment
tertiary treatment

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Microbes in Aquatic Environment
Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the

Redfield ratio
microbial loop
Gibbs free energy
Winogradsky column

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

Secondary treatment
Tertiary treatment
None of these
Primary treatment

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Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Primary treatment
Tertiary treatment
Secondary treatment

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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
half
lesser
approximately equal to

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