| 1 |
At the time of independence in 1947 the population of pakistan was |
- A. 10 m
- B. 20 m
- C. 25.7 m
- D. 32.5 m
|
| 2 |
The productivity can be indicated by. |
- A. Consumption of CO2
- B. Consumption of O2
- C. Evolution of CO2
- D. Evolution of N2
|
| 3 |
In spermatophytes important step in land adaptation is the evolution. |
- A. Seed coat
- B. Fruit
- C. Pollen tube
- D. Flower
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| 4 |
In succesion lithoseres takes place on: |
- A. Sand
- B. Water
- C. Forest floor
- D. Bare rocks
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| 5 |
Temperate deciduous forest are located in Pakistan at. |
- A. Chilas
- B. Mian wali
- C. Shogran
- D. Sindh
|
| 6 |
The causes of green house effect are: |
- A. Over urbanization
- B. Deforestation
- C. Industrialization
- D. All of them
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| 7 |
Fresh water ecosystem covers less than. |
|
| 8 |
The arctic tundra stretches acroos Northern North America, Northern Europe and. |
- A. cyprus
- B. Siberia
- C. Morocco
- D. Nepal
|
| 9 |
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
|
| 10 |
A pesticide is a chemical which destroys agricultural |
- A. Pests
- B. Competitors
- C. Crops
- D. Both a & b
|