81. |
Chlorofluorocarbon (CFC) used as coolants in refrigerators contains
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Answer:
Option (c) |
82. |
If the population of a species increases suddenly,
it is called
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Answer:
Option (d) |
83. |
Which ecosystem shows an inverted pyramid of biomass?
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Answer:
Option (a) |
84. |
The outer soil crust of the earth is known as
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Answer:
Option (c) |
85. |
The layer of atmosphere which is harmful due to the presence of pollution is
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Answer:
Option (b) |
86. |
The world Environment day is celebrated on
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Answer:
Option (b) |
87. |
Energy Pyramid is
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Answer:
Option (a) |
88. |
Autotrophs are defined as
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Answer:
Option (a) |
89. |
Chipko movement is related with
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Answer:
Option (b) |
90. |
Nitrate pollution causes
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Answer:
Option (c) |