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Microbes in Aquatic Environment

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
The sulfur pearl of Namibia, Thiomargarita namibiensis

Both (a) and (b)
is the worlds largest bacterium
is the worlds smallest bacterium
stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume

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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

Gibbs free energy
Redfield ratio
Winogradsky column
microbial loop

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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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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.

greater
approximately equal
lesser
half

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Microbes in Aquatic Environment
Trickling filter comes under

secondary treatment
primary treatment
none of these
tertiary treatment

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