Q. No.Ecotone is:
1. A polluted area
2. The bottom of a lake
3. A zone of transition between two communities
4. A zone of developing community
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Biosphere is:
| 1. | A component in the ecosystem |
| 2. | Composed of the plants present in the soil |
| 3. | Life in the outer space |
| 4. | Composed of all living organisms present on earth which interact with the physical environment |
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The ecological niche is:
| 1. | The surface area of the ocean |
| 2. | An ecologically adapted zone |
| 3. | The physical position and functional role of a species within the community |
| 4. | Formed of all plants and animals living at the bottom of a lake |
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According to Allen’s Rule, mammals from colder climates have:
1. Shorter ears and longer limbs
2. Longer ears and shorter limbs
3. Longer ears and longer limbs
4. Shorter ears and shorter limbs
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Salt concentration (Salinity) of the sea measured in parts per thousand is:
1. 10-15
2. 30-70
3. 0-5
4. 30-35
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Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
1. 18 – 25 °C and 150 – 400 cm
2. 5 – 15 °C and 50 – 100 cm
3. 30 - 50°C and 100 – 150 cm
4. 5 – 15 °C and 100 – 200 cm
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Which of the following forest plants controls the light conditions at the ground?
1. Lianas and climbers
2. Shrubs
3. Tall trees
4. Herbs
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What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
| 1. | It will grow normally |
| 2. | It will grow well because it is planted in the same locality |
| 3. | It may not survive because of changes in its microclimate |
| 4. | It grows very well because the plant gets more sunlight |
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If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the percent growth or birth rate per individual per hour?
| 1. | 100 | 2. | 200 |
| 3. | 50 | 4. | 150 |
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A population has more young individuals compared to older individuals. What would be the status of the population after some years?
1. It will decline
2. It will stabilize
3. It will increase
4. It will first decline and then stabilize
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