| 1 |
What would be expected to happen if all the nitrogen-fixing organisms ceased to exist? |
- A. There would be no significant change in number of animals
- B. The total number of biomass would be reduced
- C. All organisms would die out
- D. The nitrogen level of the atmosphere would be increase
|
| 2 |
Clearance of vast areas of forest for lumber planting subsistence crops or grazing cattle is called as |
- A. Deforestation
- B. A-forestation
- C. Forestation
- D. Both a & b
|
| 3 |
As CFC<sub>s</sub> rise to the atmosphere ultraviolet rays release |
- A. Fluorine
- B. Chlorine
- C. Carbon
- D. Hydrogen
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| 4 |
Coniferous forest located at high attitude are called. |
- A. Boreal
- B. Alpine
- C. Talga
- D. Prailes
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| 5 |
Water used for industrial purposes is about |
- A. 9%
- B. 90%
- C. 70%
- D. 50%
|
| 6 |
The zoological name of leopard cat is. |
- A. Fells domestica
- B. Felis leo
- C. Feilsbengalensis
- D. Felisparodus
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| 7 |
The arctic tundra stretches acroos Northern North America, Northern Europe and. |
- A. cyprus
- B. Siberia
- C. Morocco
- D. Nepal
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| 8 |
Lavering is the characteristic of. |
- A. Tundra
- B. Desert
- C. Grass land
- D. Talga
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| 9 |
Mountain of Karakoram are located in major terrestrial ecosystem in Pakistan. |
- A. Grass land
- B. tundra
- C. Coniferous alpine forest
- D. Temperate deciduous forest
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| 10 |
The fossil fuels are |
- A. Coal
- B. Oil
- C. Gas
- D. All a,b and c
|