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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
Fecal Streptococci
All of these
E.coli

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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
greater
lesser
approximately equal to

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Microbes in Aquatic Environment
The sulfur pearl of Namibia, Thiomargarita namibiensis

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

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Microbes in Aquatic Environment
The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.

greater
half
approximately equal
lesser

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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.

half
approximately equal
greater
lesser

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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
Escherichia
Clostridium
Chlorobium

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