111.
Largest amount of fresh water is found in
A
lakes and streams
B
underground
C
polar ice and glaciers
D
rivers
Answer :
polar ice and glaciers
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112.
Eutrophication refers to
A
High production in an aquatic ecosystem
B
Low production in an aquatic ecosystem
C
Low production in a terrestrial
D
Stable production in a terrestrial ecosystem
Answer :
High production in an aquatic ecosystem
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113.
Relative Biological Effectiveness (RBE) is usually referred to damages caused by
A
Low temperature
B
High temperature
C
Encephalitis
D
Radiation
Answer :
Radiation
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114.
Radiation is a health hazard because it occurs
A
Pneumonia
B
Leukaemia
C
Hemophillia
D
Anaemia
Answer :
Leukaemia
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115.
Sewage water is purified for recycling by the action of
A
Light
B
Micro-organisms
C
Aquatic plants
D
Fishes
Answer :
Micro-organisms
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116.
Of the followings plants which one would you consider an endangered plant, due to over exploitation
A
Dioscorea
B
Maize
C
Wheat
D
Rice
Answer :
Dioscorea
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117.
A river with an inflow of domestic sewage rich in organic waste may result in
A
drying of the river very soon due to algal bloom
B
increased population of aquatic food web organisms
C
an increased production of fish due to biodegradable nutrients
D
death of fish due to lack of oxygen
Answer :
death of fish due to lack of oxygen
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118.
The $$CO_2$$ content in the atmospheric air is about
A
0.034%
B
0.34%
C
3.34%
D
6.5%
Answer :
0.034%
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119.
Group of two or more than two plants species is called as
A
Plant community
B
Animal ecosystem
C
Plant ecosystem
D
Ecological niche
Answer :
Plant community
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120.
The tern biosphere is used for the zone of the earth where life exists
A
On the lithosphere
B
In the hydrosphere
C
In the lithosphere and hydrosphere
D
In the llithosphere, hydrosphere and atmosphere
Answer :
In the llithosphere, hydrosphere and atmosphere
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