| 1 |
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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| 2 |
In spermatophytes important step in land adaptation is the evolution. |
- A. Seed coat
- B. Fruit
- C. Pollen tube
- D. Flower
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| 3 |
The productivity of aquatic ecosystem is determined by light and |
- A. CO2
- B. Temperature
- C. Nutrients
- D. Water
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| 4 |
The biome, which has very fertile soil, rich in organic matter with maximum water holding capacity is. |
- A. Alpine forest
- B. Grassiland
- C. Desert
- D. Temperate deciduous forest
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| 5 |
In aquatic ecosystem , near shore zone is called. |
- A. Limnetic zone
- B. Littoral zone
- C. Profundal zone
- D. Benthic zone
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| 6 |
A dominant plant of the deciduous forest is the |
- A. Cactus
- B. Acacia
- C. euphorbia
- D. Taxusbaccata
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| 7 |
In oceans especially in tropical regions temperature of surface water is about |
- A. 10<sup>o</sup>C
- B. 15<sup>o</sup>C
- C. 25<sup>o</sup>C
- D. 35<sup>o</sup>C
|
| 8 |
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
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| 9 |
A form of air pollution in which airbone acids produced by electric utility plants and other sources fall to Earth in distant regions is |
- A. Acid rain
- B. Basic rain
- C. Heavy rain
- D. Drizzling
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| 10 |
The best way to increase food production from ecosystem view point is: |
- A. To increase cultivable land by clearing forest
- B. Use of excessive fertilizers
- C. Use of high quality pesticides
- D. Use of genetically improved varieties of seeds
|