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Microbes in Aquatic Environment

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

lesser
approximately equal to
half
greater

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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.

greater
lesser
half
approximately equal

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Microbes in Aquatic Environment
Trickling filter comes under

tertiary treatment
none of these
secondary treatment
primary treatment

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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?

Clostridium perfringens
Fecal Streptococci
E.coli
All of these

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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

microbial loop
Winogradsky column
Redfield ratio
Gibbs free energy

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Microbes in Aquatic Environment
Coliforms are used as indicator organisms because

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

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