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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

Chlorobium
Rhodospirillum
Escherichia
Clostridium

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

Primary treatment
Secondary treatment
Tertiary treatment
None of these

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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.

membrane filtration
Winogradsky
most probable number
MUG

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Microbes in Aquatic Environment
Trickling filter comes under

secondary treatment
primary treatment
tertiary treatment
none of these

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

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

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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

Winogradsky column
Redfield ratio
microbial loop
Gibbs free energy

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