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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

Rhodospirillum
Chlorobium
Escherichia
Clostridium

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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

microbial loop
Gibbs free energy
Winogradsky column
Redfield ratio

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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.

lesser
half
approximately equal
greater

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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
The Redfield ratio is an index of concentration of

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

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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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