| 1 |
The feeding level of an organism in an ecosystem is called. |
- A. Food Web
- B. Food chain
- C. Trophical level
- D. Secession level
|
| 2 |
All the food chains are joined together to form ..... |
- A. Food web
- B. Ecologicla pyramid
- C. Tropicla level
- D. None of these
|
| 3 |
A relationship where two species live togetehr closely is called. |
- A. Mutualism
- B. Commensalism
- C. Symbiosis
- D. Hebitate
|
| 4 |
------------- gas is released when dead organisms are decomposed by the decomposers. |
- A. Oxygen
- B. Carbon dioxide
- C. Nitrogen
- D. Hydrogen
|
| 5 |
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
|
| 6 |
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
|
| 7 |
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
|
| 8 |
Ozone is a layer of gases in ............. atmosphere of the Earth. |
- A. Upper
- B. Lower
- C. Middle
- D. Inner
|
| 9 |
Consumers that actively hunt other organism are called. |
- A. Prey
- B. Competitor
- C. Predator
- D. Symbiont
|
| 10 |
Energy of ............ is trapped as chemicla energy by producers. |
- A. Moon
- B. Atom
- C. Sun
- D. Earth
|
