Q. No.Loss of biodiversity may lead to all except:
1.
decline in plant production
2.
increased resistance to environmental perturbance
3.
increased variability in water use
4.
increased variability in pest and disease cycle
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Which group, amongst the following, has the maximum percentage of species facing threat of extinction?
| 1. | Amphibians | 2. | Birds |
| 3. | Mammals | 4. | Gymnosperms |
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Which of the following species of tiger has not gone extinct?
| 1. | Bali | 2. | Javan |
| 3. | Caspian | 4. | Siberian |
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Which of the following is not a reason that accounts for greater biodiversity of tropics?
| 1. | availability of more solar energy |
| 2. | more niche specialization |
| 3. | more time for species diversification |
| 4. | large seasonal variations in environmental factors |
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Although, India has only 2.4 % of world’s area, its share of global species diversity is about:
| 1. | 3% | 2. | 5% |
| 3. | 8% | 4. | 11% |
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Approximately, what number of species have been identified, named and studied?
| 1. | 1.0 million | 2. | 1.5 million |
| 3. | 1.7 million | 4. | 2.0 million |
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The greatest biodiversity on the earth is found in:
| 1. | African grasslands |
| 2. | Amazonian rain forest in South America |
| 3. | Western Ghats in India |
| 4. | Nile delta in Egypt |
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The biodiversity hotspots in India include all the following except:
| 1. | Western Ghats and Sri Lanka | 2. | Indo-Burma |
| 3. | Himalayas | 4. | Deccan plateau |
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What percent of earth’s area is covered by hotspots of biodiversity?
| 1. | less than 2 | 2. | about 7 |
| 3. | about 11 | 4. | more than 16 |
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According to your NCERT text, the number of biosphere reserves, national parks and wildlife sanctuary in India are respectively:
| 1. | 14, 90 and 448 | 2. | 11, 98 and 440 |
| 3. | 15, 101 and 403 | 4. | 13, 92 and 427 |
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