Microbes in Aquatic Environment

 

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Microbes in Aquatic Environment

Question 1
Activated sludge undergoes
A
Primary treatment
B
Secondary treatment
C
Tertiary treatment
D
any of these

Question 2
Removal of solids is generally considered as a
A
Primary treatment
B
Secondary treatment
C
Tertiary treatment
D
None of these

Question 3
Which of the following species in water reveal the presence of fecal pollution of human or animal origin?
A
E.coli
B
Fecal Streptococci
C
Clostridium perfringens
D
All of these

Question 4
Coliforms are used as indicator organisms because
A
they are present wherever enteric pathogens are present
B
a testing procedure with great specificity is easy to perform
C
both (a) and (b)
D
none of the above

Question 5
Which of the following is correct?
A
A Winogradsky column is used to filter out microorganisms from a water sample taken from a deep black smoker
B
A Winogradsky column is used to demonstrate interactions and gradients that occur in aquatic environments
C
Both (a) and (b)
D
A Winogradsky column is used to filter out microorganisms from non-aquatic environments

Question 6
Trickling filter comes under
A
primary treatment
B
secondary treatment
C
tertiary treatment
D
none of these

Question 7
Loss of carbon through the microbial loop in oligotrophic environments is ..... to/than the loss of carbon through the microbial loop in copiotrophic environments.
A
greater
B
lesser
C
approximately equal
D
half

Question 8
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
A
greater
B
lesser
C
approximately equal to
D
half

Question 9
Hyphomycete fungi
A
produce nonmotile tetaradiate conidia
B
grow in leaves and the infected leaves are the preferred food source for some aquatic insects
C
both (a) and (b)
D
none of the above

Question 10
Which of the following is correct?
A
All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes
B
All members of Fungi are also members of Hyphomycetes, but not all members of Hyphomycetes are members of Fungi
C
All members of Hyphomycetes are members of Fungi, and all members of Fungi are members of Hyphomycetes
D
No member of Hyphomycetes is a member of Fungi
There are 10 questions to complete.

 

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