A. Natural flora of a place
B. Natural balance of our environment
C. Natural geo-chemical cycles
D. All the above three
0
Biological treatment of water pollution is done with the help of:
0
Foul smell in the water tanks, ponds etc, is due to:
A. Lichens
B. Fungi
C. Phytoplanktons
D. None of the above
0
Air pollution is not caused by:
A. Anaerobiosis
B. Aerobiosis
C. Biological magnification
D. Psammophytes
0
If water pollution continues at its present rate, it will eventually:
A. Thermal power plant
B. Diesel engine
C. Hydroelectric power station
D. Pollen grain
0
Which of the following is likely to have the highest level of DDT deposition in its body?
A. Make oxygen molecules unavailable to aquatic life
B. Make nitrates unavailable to aquatic life
C. Prevent precipitation
D. Stop the water cycle
0
Which of the following enhances BOD of water?
A. Eel
B. Crab
C. Sea gull
D. Phytoplanktons
0
The part of earth in which life exists is known as:
A. Algae
B. Sand
C. Moss
D. Sugar mill effluents
0
Mercury pollution causes a disease:
A. Lithosphere
B. Biosphere
C. Atmosphere
D. Hydrosphere
0
Heating of earth surface is due to:
A. Methaelo binemia
B. Minamata
C. Foolish disease
D. Hepatitis
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