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.

low oxygen diffusion environment; lakes

high oxygen diffusion environment; soils

low oxygen diffusion environment; soils

high oxygen diffusion environment; lakes

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

None of these

a testing procedure with great specificity is easy to perform

both (a) and (b)

they are present wherever enteric pathogens are present

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Enterobacter aerogenes

Klebsiella pneumoniae

Salmonella typhi

Escherichia coli

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Tertiary treatment

Primary treatment

None of these

Secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

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

All of these

Clostridium perfringens

Fecal Streptococci

E.coli

TRUE ANSWER : ?
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

Gibbs free energy

microbial loop

Winogradsky column

Redfield ratio

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

None of these

both (a) and (b)

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

produce nonmotile tetaradiate conidia

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

any of these

Secondary treatment

Primary treatment

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

nitrogen, potassium and iron

carbon, hydrogen and oxygen

carbon, nitrogen and phosphorous

carbon, phosphorous and sulfur

TRUE ANSWER : ?
YOUR ANSWER : ?

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

half

lesser

greater

approximately equal

TRUE ANSWER : ?
YOUR ANSWER : ?