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Microbes in Aquatic Environment

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

Clostridium perfringens
E.coli
Fecal Streptococci
All of these

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

Clostridium
Escherichia
Chlorobium
Rhodospirillum

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Microbes in Aquatic Environment
Activated sludge undergoes

Primary treatment
Secondary treatment
any of these
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

half
lesser
greater
approximately equal to

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

Secondary treatment
Primary treatment
None of these
Tertiary 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

microbial loop
Gibbs free energy
Winogradsky column
Redfield ratio

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