1. Fluorides
2. Carbon monoxide
3. Sulphur dioxide
4. Ozone
Ozone
1. There is no O2 to sustain microbial activity
2. No sunlight is present
3. Microbes die
4. Pollutants settle down automatically
Microbes die
1. remain closed at night
2. remain closed during day
3. remain always open
4. do not show any specificity in opening and closing
remain always open
1. Bright’s disease
2. Minamata disease
3. Hashimoto disease
4. Osteosclerosis
Minamata disease
1. can live upto this concentration
2. will die if concentration is lower than this
3. can tolerate ten times more concentration of DDT than 102 ppm.
4. cannot tolerate DDT at all
can live upto this concentration
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. photochemical oxidants
2. aerosols
3. loess
4. smog
aerosols
1. force created in the cells of the root
2. increased respiratory activity in root cells
3. tension on the cell sap due to transpiration
4. osmotic force in the shoot system
tension on the cell sap due to transpiration
1. Trophic
2. Euphotic
3. Oligotrophic
4. Eutrophic
Eutrophic
1. the amount of urea in blood increases
2. blood comes out alongwith urine
3. kidney stones are developed
4. All of the above
All of the above