Ecosystem Roles UPSC Questions

General Issues on Environmental Ecology, Bio-diversity & Climate Change

Ecosystem Roles MCQ Questions


13.
What kind of ecological pyramid is always upright?
A.
Pyramid of numbers
B.
Pyramid of biomass
C.
Pyramid of energy
D.
All of the above
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ANSWER :
C. Pyramid of energy
14.
With reference to the food chains in ecosystems, which of the following kinds of organism is/are known as decomposer organism/organisms?
1. Virus
2. Fungi
3. Bacteria
Select the correct answer using the codes given below.
UPSC - 2013
A.
1 only
B.
2 and 3 only
C.
1 and 3 only
D.
1, 2 and 3
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ANSWER :
B. 2 and 3 only
15.
With reference to food chains in ecosystems, consider the following statements:
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
UPSC - 2013
A.
1 only
B.
1 and 2 only
C.
1, 2 and 3
D.
None
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ANSWER :
A. 1 only
16.
In which ecosystem is the pyramid of biomass inverted?
A.
Grassland ecosystem
B.
Forest ecosystem
C.
Aquatic ecosystem
D.
Desert ecosystem
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ANSWER :
C. Aquatic ecosystem
17.
Which of the following is NOT a type of ecological pyramid?
A.
Pyramid of time
B.
Pyramid of numbers
C.
Pyramid of biomass
D.
Pyramid of energy
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ANSWER :
A. Pyramid of time
18.
consider the following organisms:
1. Agricus
2. Nostoc
3. Spirogyra
Which of the above is/are used as biofertilizer/biofertilizers?
UPSC - 2013
A.
1 and 2
B.
2 only
C.
2 and 3
D.
3 only
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ANSWER :
B. 2 only