Ecosystem Roles UPSC Questions

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

Ecosystem Roles MCQ Questions


13.
Which of the following ecological pyramids can be inverted?
A.
Pyramid of energy
B.
Pyramid of biomass
C.
Pyramid of matter
D.
Pyramid of heat
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ANSWER :
B. Pyramid of biomass
14.
What does the pyramid of energy reflect?
A.
Photosynthesis rate
B.
Population density
C.
Laws of thermodynamics
D.
Water availability
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ANSWER :
C. Laws of thermodynamics
15.
Which process leads to increasing concentration of pollutants through trophic levels?
A.
Bioaccumulation
B.
Photosynthesis
C.
Biomagnification
D.
Nitrogen fixation
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ANSWER :
C. Biomagnification
16.
Which pollutant is associated with biomagnification?
A.
Carbon monoxide
B.
Sulphur dioxide
C.
DDT
D.
Ozone
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ANSWER :
C. DDT
17.
Which of the following interactions is neutral for both species?
A.
Commensalism
B.
Neutralism
C.
Amensalism
D.
Parasitism
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ANSWER :
B. Neutralism
18.
What is the main function of decomposers in the detritus food chain?
A.
Photosynthesis
B.
Respiration
C.
Breaking down dead matter
D.
Predation
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ANSWER :
C. Breaking down dead matter