| 1 |
Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment. |
- A. Hydrogen
- B. Iodine
- C. Oxygen
- D. Nitrogen
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| 2 |
Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980 |
- A. 100
- B. 200
- C. 300
- D. 400
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| 3 |
The energy of the Sun in traped as chemical energy by. |
- A. Tertiary consumers
- B. Primary consumers
- C. Producers
- D. Secondary consumers
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| 4 |
Energy of ............ is trapped as chemicla energy by producers. |
- A. Moon
- B. Atom
- C. Sun
- D. Earth
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| 5 |
Which is the solution of environmental problems. |
- A. Reducing pollution
- B. Plantation
- C. Protection of endangered
- D. All these
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| 6 |
A symbiotic relationship in whihc both speciesl get benefit is called. |
- A. Commensalism
- B. Hebitate
- C. Mutualism
- D. Symbiosis
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| 7 |
All the food chains are joined together to form ..... |
- A. Food web
- B. Ecologicla pyramid
- C. Tropicla level
- D. None of these
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| 8 |
Green house gases is |
- A. Carbon di oxide
- B. Methane
- C. Oxides of nitrogen
- D. All these
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| 9 |
The poisonous and harmsful substances which make the air unfavorable for life are called. |
- A. Solid pollutant
- B. Air pollutant
- C. Water pollutant
- D. Acid Rain
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| 10 |
Organism in ecologicla communits interact with one anothe rin....... major ways. |
- A. Two
- B. three
- C. Four
- D. Five
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