| 1 |
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
|
| 2 |
Consumers that actively hunt other organism are called. |
- A. Prey
- B. Competitor
- C. Predator
- D. Symbiont
|
| 3 |
Ozone is a layer of gases in ............. atmosphere of the Earth. |
- A. Upper
- B. Lower
- C. Middle
- D. Inner
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| 4 |
Which factor is responsible for ecological imbalance. |
- A. Over hunting
- B. Change in water supply
- C. Migration
- D. All these
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| 5 |
A relationship where two species live togetehr closely is called. |
- A. Mutualism
- B. Commensalism
- C. Symbiosis
- D. Hebitate
|
| 6 |
The organisms upon whihc a redator feeds are called. |
- A. Prey
- B. Carnivores
- C. Herbivores
- D. Producers
|
| 7 |
------------- through the food chain is one of the most important functionsof an ecosystem in maintaining balance of nature. |
- A. Waisting of energy
- B. Destroy fo energy
- C. Transfer of energy
- D. Produce of energy
|
| 8 |
The energy of the Sun in traped as chemical energy by. |
- A. Tertiary consumers
- B. Primary consumers
- C. Producers
- D. Secondary consumers
|
| 9 |
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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| 10 |
--------occupy the b ase of pyramid. |
- A. Producers
- B. Primary canivores
- C. Herbivores
- D. Top carnivores
|