1. the use of chemical pesticide
2. the use of radioactive substance
3. by using pesticide taking into account number and composition of pest population
4. use of steam
use of steam
1. Hyaenas and Wolves will become scarce
2. The wild areas will be safe for man and domestic animals
3. Its gene pool will be lost for ever
4. The population of beautiful animals like deers will get stabilized
Its gene pool will be lost for ever
1. Predation
2. Pollution
3. Destruction of habitat
4. Felling of trees
Destruction of habitat
1. Soil erosion in the plains
2. Soil conservation on the hills
3. Deforestation in the plains
4. Deforestation in the catchment area
Deforestation in the catchment area
1. Soil
2. Water
3. Noise
4. Air
Air
1. Both (A) and (R) are true and the (R) is the correct explanation of the (A)
2. Both (A) and (R) are true but the (R) is not the correct explanation of the (A)
3. (A) is true statement but (R) is false
4. Both (A) and (R) are false
(A) is true statement but (R) is false
1. By creating biosphere reserve
2. By creating botanical gardens
3. By developing seed bank
4. By tissue culture method
By creating biosphere reserve
1. 13 per cent
2. 23 per cent
3. 33 per cent
4. 43 per cent
33 per cent
1. mosquito population has become strong
2. DDT is adulterated
3. DDT has selection pressure on the genetic variability
4. mosquitoes have developed adaptive resistance to pesticides
mosquitoes have developed adaptive resistance to pesticides
1. are capable of surviving in harsh environmental conditions
2. indicate presence of certain minerals in the soil
3. have become rare due to overexploitation
4. play an important role in supporting other species
are capable of surviving in harsh environmental conditions