MICROBES IN AQUATIC ENVIRONMENT QUIZ

is an environment like where microorganisms are functioning in an extremely thin film of water and where oxygen-containing air is close to them.

high oxygen diffusion environment; lakes

low oxygen diffusion environment; lakes

low oxygen diffusion environment; soils

high oxygen diffusion environment; soils

TRUE ANSWER : ?
YOUR ANSWER : ?

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

greater

lesser

approximately equal

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YOUR ANSWER : ?

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

microbial loop

Gibbs free energy

Redfield ratio

Winogradsky column

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YOUR ANSWER : ?

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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YOUR ANSWER : ?

Hyphomycete fungi

produce nonmotile tetaradiate conidia

both (a) and (b)

grow in leaves and the infected leaves are the preferred food source for some aquatic insects

None of these

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YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

Both (a) and (b)

is the worlds smallest bacterium

is the worlds largest bacterium

stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume

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YOUR ANSWER : ?

Activated sludge undergoes

Tertiary treatment

any of these

Secondary treatment

Primary treatment

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YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

nitrogen, potassium and iron

carbon, nitrogen and phosphorous

carbon, hydrogen and oxygen

carbon, phosphorous and sulfur

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YOUR ANSWER : ?

Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except

Clostridium

Rhodospirillum

Chlorobium

Escherichia

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Trickling filter comes under

tertiary treatment

none of these

primary treatment

secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

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