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.

approximately equal

half

greater

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

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

greater

approximately equal

lesser

half

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

both (a) and (b)

they are present wherever enteric pathogens are present

a testing procedure with great specificity is easy to perform

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Primary treatment

Secondary treatment

Tertiary treatment

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Primary treatment

Secondary treatment

any of these

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

tertiary treatment

secondary treatment

primary treatment

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Rhodospirillum

Clostridium

Escherichia

Chlorobium

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Escherichia coli

Enterobacter aerogenes

Klebsiella pneumoniae

Salmonella typhi

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

approximately equal to

half

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

Both (a) and (b)

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

is the worlds smallest bacterium

is the worlds largest bacterium

TRUE ANSWER : ?
YOUR ANSWER : ?