Our Environment
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318
In the given food chain if the amount of energy at the fourth trophic level is 4 kJ, what ...
By Tulika pia, 5 years ago
replies 1
0
1
141
The depletion of the ozone layer causes (a) global warning (b) earthquakes (c) increased U...
By Tulika pia, 5 years ago
replies 1
0
1
125
0
1
118
Which of the following chemicals causes depletion of the ozone layer?
By Tulika pia, 5 years ago
replies 1
0
1
371
Which one of the following pairs belong to the category of primary consumers?
By Tulika pia, 5 years ago
replies 1
0
1
128
Which of the following is an abiotic component of an ecosystem?
By Tulika pia, 5 years ago
replies 1
0
1
194
Which of the following is biodegradable? (a) Aluminium can (b) Polythene bag (c) Cowdung (...
By Tulika pia, 5 years ago
replies 1
0
1
134
Acid rain is caused by the oxides of (a) carbon (b) nitrogen only (c) sulphur only (d) sul...
By Tulika pia, 5 years ago
replies 1
0
1
116
Which one of the following is an artificial ecosystem? (a) Lake (b) Forest (c) Pond (d) Cr...
By Tulika pia, 5 years ago
replies 1
0
1
151
Excessive exposure to ultraviolet radiation causes (a) inflammation of liver (b) cancer of...
By Tulika pia, 5 years ago
replies 1
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