Q. No.The highest concentration of polycarbonated biphenyls [PCBs] in a lake is expected in:
1.
Small fish
2.
Sediment
3.
Phytoplankton
4.
Zooplankton
The addition of fertilizers is frequently required in agricultural lands but not in wild mainly because:
| 1. | nitrogen-fixing bacteria and detrivores are less potent in agricultural lands. |
| 2. | the nutrients that enter the plants are not returned to the soil on lands where they are harvested. |
| 3. | the agricultural lands are selected for their oligotrophic soils. |
| 4. | cultivation of agricultural lands inhibits the decomposition of organic matter. |
What is most likely to occur due to continued global warming?
| 1. | Poleward movement of plant communities |
| 2. | A fall in the sea levels |
| 3. | Increased decomposition of organic matter in the polar region |
| 4. | Increase in tundra regions |
The environmental pollutants that will have the most negative effects would be:
1. human organic wastes
2. wastes from feedlots
3. an excess of natural nutrients
4. non-biodegradable chemicals
Kyoto protocol commits signatories to:
1. Plant more trees
2. Cut forests for agriculture
3. Increasing nitrogen oxides into the atmosphere
4. Increasing the amount of methane in the atmosphere
“Greenpeace” is a non-governmental environmental organization with headquarters in:
1. Geneva, Switzerland
2. Paris, France
3. Amsterdam, Netherlands
4. Nuuk, Greenland
Identify the incorrectly matched pair:
|
1. |
Ozone depletion |
DNA damage |
|
2. |
Greenhouse effect |
Increased atmospheric carbon dioxide |
|
3. |
Acid rain |
pH < 5 |
|
4. |
Eutrophication |
Decreased primary productivity |
The radiatively active gas with the maximum percent increase in the atmosphere since 1750 AD is:
| 1. | Carbon dioxide | 2. | Methane |
| 3. | Nitrous oxide | 4. | Chlorofluorocarbons |
Non-biodegradable pollutants are created by:
1. Nature
2. Excessive use of resources
3. Humans
4. Natural disasters
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According to Central Pollution Control Board, the diameter of particles that are responsible for causing great harm to human health is:
1. 2.5 micrometer
2. 5.0 micrometer
3. 10.0 micrometer
4. 7.5 micrometer
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