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

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

Primary treatment
Tertiary treatment
Secondary treatment
None of these

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

Enterobacter aerogenes
Salmonella typhi
Klebsiella pneumoniae
Escherichia coli

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

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

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Microbes in Aquatic Environment
Chemical precipitation of phosphorus is

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

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