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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
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
Chemical precipitation of phosphorus is

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

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

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

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Microbes in Aquatic Environment
Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.

most probable number
MUG
Winogradsky
membrane filtration

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Microbes in Aquatic Environment
Coliforms are used as indicator organisms because

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

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