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Microbes in Aquatic Environment

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

Klebsiella pneumoniae
Salmonella typhi
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

Winogradsky column
Gibbs free energy
microbial loop
Redfield ratio

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

Rhodospirillum
Escherichia
Chlorobium
Clostridium

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Microbes in Aquatic Environment
Trickling filter comes under

tertiary treatment
primary treatment
secondary treatment
none of these

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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
carbon, phosphorous and sulfur
nitrogen, potassium and iron

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Microbes in Aquatic Environment
Coliforms are used as indicator organisms because

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

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