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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
Chlorobium
Clostridium
Rhodospirillum

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Microbes in Aquatic Environment
Trickling filter comes under

tertiary treatment
secondary treatment
primary treatment
none of these

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Microbes in Aquatic Environment
All of the following species are considered coliforms except

Salmonella typhi
Klebsiella pneumoniae
Enterobacter aerogenes
Escherichia coli

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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

Gibbs free energy
microbial loop
Redfield ratio
Winogradsky column

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

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

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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
greater
lesser
half

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