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Microbes in Aquatic Environment

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

Tertiary treatment
None of these
Primary treatment
Secondary treatment

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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
Redfield ratio
Gibbs free energy
microbial loop

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Microbes in Aquatic Environment
Which of the following species in water reveal the presence of fecal pollution of human or animal origin?

All of these
Fecal Streptococci
Clostridium perfringens
E.coli

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

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

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Microbes in Aquatic Environment
The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.

lesser
approximately equal
half
greater

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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
approximately equal to
half
lesser

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