121.
DDT residues are rapidly passed through food chain causing biomagnification because DDT is A
moderately toxic
B
non-toxic to aquatic animals
C
water soluble
D
lipo soluble
Answer :
lipo soluble
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122.
Which one of the following is a pair of endangered species A
Garden lizard and Mexican poppy
B
Rhesus monkey and Sal tree
C
Indian peacock and carrot grass
D
Hornbill and Indian Aconite
Answer :
Hornbill and Indian Aconite
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123.
Which of the following is absent in polluted water A
Hydrilla
B
Water hyacinth
C
Larva of stone fly
D
Blue green algae
Answer :
Larva of stone fly
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124.
Soil erosion can be prevented by A
Over grazing
B
Removal of vegetation
C
Afforestation (Plantation)
D
Increasing bird population
Answer :
Afforestation (Plantation)
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125.
One of the following is associated with the conservation of forests A
Kaziranga
B
Ghana
C
Silent valley
D
Gir
Answer :
Silent valley
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126.
The Pyramid of numbers in grassland ecosystem will be A
Up right
B
Inverted
C
Irregular
D
Linear
Answer :
Up right
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127.
Which one of the following pairs is mismatched A
Nuclear power - radioactive wastes
B
Solar energy - grenhouse effect
C
Fossil fuel burning - release of CO2
D
Biomass burning - release of CO2
Answer :
Solar energy - grenhouse effect
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128.
Cotton dust in an important pollutant is A
Delhi
B
Ahemadabad
C
Madras
D
Calcutta
Answer :
Ahemadabad
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129.
Which one of the following is the correct percentage of the two (out of the total of 4 ) green house gases that contribute to the total global warming A
N2 O 6%, CO2 86%
B
Methane 20%, N2 O 18%
C
CFCs 14%, Methane 20%
D
CO2 40% CFCs 30%
Answer :
CFCs 14%, Methane 20%
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130.
What is the best pH of the soil for cultivation of plants A
3.4 - 5.4
B
6.5 - 7.5
C
4.5 - 8.5
D
5.5 - 6.5
Answer :
5.5 - 6.5
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