MICROBES IN AQUATIC ENVIRONMENT QUIZ

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

lesser

greater

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Secondary treatment

None of these

Tertiary treatment

Primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

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

None of these

produce nonmotile tetaradiate conidia

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following species in water reveal the presence of fecal pollution of human or animal origin?

Fecal Streptococci

Clostridium perfringens

E.coli

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Klebsiella pneumoniae

Enterobacter aerogenes

Salmonella typhi

Escherichia coli

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

tertiary treatment

secondary treatment

primary treatment

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

half

lesser

greater

TRUE ANSWER : ?
YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

carbon, phosphorous and sulfur

carbon, nitrogen and phosphorous

nitrogen, potassium and iron

carbon, hydrogen and oxygen

TRUE ANSWER : ?
YOUR ANSWER : ?

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

high oxygen diffusion environment; soils

low oxygen diffusion environment; soils

low oxygen diffusion environment; lakes

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

most probable number

Winogradsky

MUG

membrane filtration

TRUE ANSWER : ?
YOUR ANSWER : ?

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