MICROBES IN AQUATIC ENVIRONMENT QUIZ

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

Escherichia

Clostridium

Rhodospirillum

Chlorobium

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Salmonella typhi

Enterobacter aerogenes

Klebsiella pneumoniae

Escherichia coli

TRUE ANSWER : ?
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

TRUE ANSWER : ?
YOUR ANSWER : ?

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

greater

half

approximately equal

lesser

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

greater

lesser

approximately equal to

half

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

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

both (a) and (b)

None of these

produce nonmotile tetaradiate conidia

TRUE ANSWER : ?
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

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Tertiary treatment

Primary treatment

Secondary treatment

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

tertiary treatment

primary treatment

secondary treatment

both (a) and (b)

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.

greater

lesser

half

approximately equal

TRUE ANSWER : ?
YOUR ANSWER : ?

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