| 1 |
Oxone molecule is made up by binding of three atoms of |
- A. Nitrogen
- B. Oxygen
- C. Hydrogen
- D. Carbon
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| 2 |
Air is being polluted rapidly due to |
- A. Industrialization
- B. Automobiles
- C. Sewage
- D. Both a & b
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| 3 |
Which statement defines the net primary production in an ecosystem over a given time period? |
- A. The total amount of organic matter in the plants in excess of that used in respiration
- B. The total amount of organic matter used in respiration by all the organisms present
- C. The total amount of photosynthesis product from all plants
- D. The total amount of organic matter in all organisms present
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| 4 |
A dominant plant of the deciduous forest is the |
- A. Cactus
- B. Acacia
- C. euphorbia
- D. Taxusbaccata
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| 5 |
Chilas has major terrestrial ecosystem. |
- A. Deciduous forest
- B. Alpine Forest
- C. Grass land
- D. Tundra
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| 6 |
Ecosystem present on land or soil is called. |
- A. Terrestrial
- B. Atmosphere
- C. Lithosphere
- D. Both a and c
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| 7 |
The total energy from the sun is happened by the producers in an ecosystem is about? |
- A. 20 %
- B. 10 %
- C. 5 %
- D. 1 %
|
| 8 |
The producers in limnetic zone are |
- A. Amoebae
- B. Cyanobacteria
- C. Crustaceans
- D. Hydrilla
|
| 9 |
The earth surface covered with water is |
- A. 35%
- B. 11%
- C. 21%
- D. 33%
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| 10 |
Only 30% of the earth is dry land the remainder being covered with |
- A. Water
- B. Air
- C. Trees
- D. Grass
|