Q. No.Consider the following statements:
1.
The “bad” ozone is the ozone that is formed in the troposphere.
2.
The “good ozone” in the stratosphere acts as a shield against harmful UV radiation.
3.
UV-A radiations can cause skin cancers and snow-blindness cataracts.
Which of the above statements are true?
1.
I and II only
2.
I and III only
3.
II and III only
4.
I, II, and III
Which of the above statements are true?
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life is called:
1. dystrophic
2. oligotrophic
3. eutrophic
4. ecotrophic
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Which of the following is not a consequence of deforestation?
| 1. | An increase in atmospheric carbon dioxide as trees can hold a lot of carbon in their biomass. |
| 2. | Loss of biodiversity due to habitat destruction. |
| 3. | A wetter climate as trees can hold a lot of water. |
| 4. | Soil erosion due to loss of the protective layer of vegetation. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Slash and burn agriculture leads to nutrient-depleted soils and deforestation if:
1. crash crops are implanted rather than cereals
2. it is practiced in a sufficiently larger area
3. some useful trees are retained by the farmers
4. sufficient time is not allowed for the land to recover
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Ozone hole is:
| 1. | a partial gap in the stratospheric ozone layer over Antarctica |
| 2. | a partial gap in the stratospheric ozone layer over Arctic |
| 3. | thinning of ozone layers over polar regions |
| 4. | excessive buildup of lower troposphere ozone |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Burying the radioactive wastes is not acceptable to many people as:
1. there is a risk of groundwater contamination
2. it may explode
3. it will harm the buried dead bodies
4. it may get accumulated in vegetation
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Which of the following is not an ill effect of PAN?
1. inhibition of electron transport system in plants
2. damage to chloroplasts in plants
3. acute irritation of eyes in humans
4. leukemia in humans
© 2024 GoodEd Technologies Pvt. Ltd.