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MICROBES IN AQUATIC ENVIRONMENT

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

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

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

None of these
Primary treatment
Tertiary treatment
Secondary treatment

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

Enterobacter aerogenes
Klebsiella pneumoniae
Salmonella typhi
Escherichia coli

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Microbes in Aquatic Environment
The sulfur pearl of Namibia, Thiomargarita namibiensis

stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume
Both (a) and (b)
is the worlds largest bacterium
is the worlds smallest bacterium

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Microbes in Aquatic Environment
Chemical precipitation of phosphorus is

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

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