MICROBES IN AQUATIC ENVIRONMENT QUIZ

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

Clostridium

Chlorobium

Rhodospirillum

Escherichia

TRUE ANSWER : ?
YOUR ANSWER : ?

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

lesser

approximately equal

half

greater

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.

approximately equal

half

greater

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

secondary treatment

both (a) and (b)

tertiary treatment

primary treatment

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

half

lesser

approximately equal to

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; soils

high oxygen diffusion environment; lakes

low oxygen diffusion environment; soils

low oxygen diffusion environment; lakes

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Secondary treatment

Primary treatment

None of these

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

produce nonmotile tetaradiate conidia

None of these

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

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

a testing procedure with great specificity is easy to perform

they are present wherever enteric pathogens are present

None of these

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

carbon, nitrogen and phosphorous

carbon, phosphorous and sulfur

carbon, hydrogen and oxygen

nitrogen, potassium and iron

TRUE ANSWER : ?
YOUR ANSWER : ?