1. refractory period
2. period of excitability
3. period of summation
4. None of these
refractory period
1. Arresters
2. Scrubbers
3. Filters
4. Electrostatic precipitator
5. Incinerator
Incinerator
1. Eye of frog
2. eye of mammals
3. Ear of mammals
4. tongue of frog
Ear of mammals
1. Reducing the green-house gas emission by limiting the use of fossil fules
2. Increase the vegetation cover particulary the forest for photosynthetic utilization of CO2
3. Minimising the use of nitrogen fertilizers,in agriculture for reducing NO2 emission
4. Icreasing the use of air conditioners,refrigeration unit and production of plastic
Icreasing the use of air conditioners,refrigeration unit and production of plastic
1. The insecticide act
2. The water(preventation and control of pollution) Act
3. The air (preventation and control of pollution) Act
4. The noise (preventation and control of pollution) Act
5. The environment (protection) act
The environment (protection) act
1. myopia
2. hypermetropia
3. cataract
4. astigmatism
cataract
1. Domestic exhaust
2. Burning of cooking gas
3. Thermal power plant
4. Automobile exhaust
Automobile exhaust
1. CFCs,CO2,NH2 and NO2
2. O2,N2 and NO2
3. N2,CO2 and NH4
4. None of the above
CFCs,CO2,NH2 and NO2
1. Removal of wild animals and pets
2. Eradication of weeds
3. Removal of wild plants
4. Addition of their excreta into the soil
Addition of their excreta into the soil
1. Producers
2. Primary consumers
3. Secondary consumers
4. Top consumers
Primary consumers