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| 1. |
Which of the following terms is used for several individuals of a species living together in a locality? |
| A. |
Biosphere |
B. |
Bio-community |
| C. |
Ecosystem |
D. |
Population |
Answer: Option B
Explanation:
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| 2. |
Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere? |
| A. |
Chlorofluorocarbons |
B. |
Nitrous oxide |
| C. |
Sulphur oxide |
D. |
Carbon oxide |
Answer: Option A
Explanation:
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| 3. |
Light emitted by sun reaches earth in: |
| A. |
8 seconds |
B. |
10 seconds |
| C. |
12 seconds |
D. |
20 seconds |
Answer: Option A
Explanation:
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| 4. |
Uncontrolled industrialisation leads to acid rain. It is mainly contributed by: |
| A. |
Nitrous and sulphur oxide |
B. |
Carbon dioxide |
| C. |
Methan gas |
D. |
Chlorofluorocarbons |
Answer: Option A
Explanation:
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| 5. |
The study of relation of animals and plants to their surroundings is called: |
| A. |
Ecology |
B. |
Ethnology |
| C. |
Genealogy |
D. |
Iconology |
Answer: Option A
Explanation:
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| 6. |
Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to: |
| A. |
Producers |
B. |
Decomposers |
| C. |
Consumers |
D. |
None of these |
Answer: Option B
Explanation:
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| 7. |
Which of the following is biodegradable? |
| A. |
Paper |
B. |
D.D.T |
| C. |
Aluminium |
D. |
Plastic |
Answer: Option A
Explanation:
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| 8. |
If all the plants of the World die, all the animals will also die due to shortage of: |
| A. |
Cold air |
B. |
Oxygen |
| C. |
Food |
D. |
Shelter |
Answer: Option B
Explanation:
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| 9. |
The most dangerous consequence of excessive deforestation is: |
| A. |
Soil erosion |
B. |
Loss of forest wealth |
| C. |
Loss of many valuable plants |
D. |
None of these |
Answer: Option A
Explanation:
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| 10. |
Which amongst the following pairs of organisms represents predator - prey relationship? |
| A. |
Tiger and deer |
B. |
Man and camel |
| C. |
Deer and rabit |
D. |
None of these |
Answer: Option A
Explanation:
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