Environment and Ecology TNPSC Group 2 2A Questions

Environment and Ecology MCQ Questions

7.
If the plant producer dies in the ecosystem, then the system is
A.
Seriously affected
B.
Cannot produce food
C.
Can have more producer
D.
Hardly affected
ANSWER :
A. Seriously affected
8.
Urea is fromed during
A.
Kreb's cycle
B.
Citric acid cycle
C.
Ornithine cycle
D.
Nitrogen cycle
ANSWER :
C. Ornithine cycle
9.
Air pollutants destroy the
A.
Oxygen layer
B.
Nitrogen layer
C.
Cloud layer
D.
Ozone layer
ANSWER :
D. Ozone layer
10.
The gases which are responsible for acid rain are
A.
Nitrogen dioxide and Carbon dioxide
B.
Nitrogen dioxide and Sulphur dioxide
C.
Carbon dioxide and Sulphur dioxide
D.
Carbon dioxide,Sulphur dioxide and Nitrogen dioxide
ANSWER :
B. Nitrogen dioxide and Sulphur dioxide
11.
Which one of the following is correctly matched?
A.
Producer - Deer
B.
Primary consumer - Leopard
C.
Secondary consumer - Grass
D.
Decomposer - Bacteria
ANSWER :
D. Decomposer - Bacteria
12.
The total organic matter present in an ecosystem is referred as
A.
Biomass
B.
Biosphere
C.
Biome
D.
Biocoenosis
ANSWER :
A. Biomass