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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

approximately equal to
greater
lesser
half

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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

Escherichia
Chlorobium
Rhodospirillum
Clostridium

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Microbes in Aquatic Environment
Trickling filter comes under

primary treatment
none of these
tertiary treatment
secondary 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, phosphorous and sulfur
carbon, nitrogen and phosphorous

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Microbes in Aquatic Environment
Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.

approximately equal
lesser
greater
half

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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.

MUG
most probable number
membrane filtration
Winogradsky

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