Ecology and Environment AFCAT Questions

AFCAT Environmental Geography

Ecology and Environment MCQ Questions


13.
The standing crop in an ecosystem refers to:
A.
Total biomass of organisms at a given time
B.
Crops standing in the field
C.
Total area of vegetation
D.
Total energy in the ecosystem
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ANSWER :
A. Total biomass of organisms at a given time
14.
Gross Primary Productivity (GPP) minus Respiration gives:
A.
Standing Crop
B.
Net Primary Productivity (NPP)
C.
Decomposition Rate
D.
Secondary Productivity
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ANSWER :
B. Net Primary Productivity (NPP)
15.
Which one is a decomposer?
A.
Eagle
B.
Phytoplankton
C.
Fungi
D.
Grasshopper
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ANSWER :
C. Fungi
16.
Which biogeochemical cycle is NOT a gaseous cycle?
A.
Carbon cycle
B.
Oxygen cycle
C.
Phosphorus cycle
D.
Nitrogen cycle
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ANSWER :
C. Phosphorus cycle
17.
The process by which atmospheric nitrogen is converted into ammonia by microorganisms is called:
A.
Nitrification
B.
Nitrogen fixation
C.
Denitrification
D.
Ammonification
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ANSWER :
B. Nitrogen fixation
18.
Which bacterium is associated with root nodules of leguminous plants?
A.
Rhizobium
B.
Nitrosomonas
C.
Azotobacter
D.
Pseudomonas
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ANSWER :
A. Rhizobium