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Microbes in Aquatic Environment

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

Rhodospirillum
Clostridium
Chlorobium
Escherichia

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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?

Fecal Streptococci
Clostridium perfringens
E.coli
All of these

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Microbes in Aquatic Environment
Activated sludge undergoes

Secondary treatment
any of these
Primary treatment
Tertiary treatment

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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
lesser
half
approximately equal to

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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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