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
Which group, amongst the following, has the maximum percentage of species facing threat of extinction?
| 1. | Amphibians | 2. | Birds |
| 3. | Mammals | 4. | Gymnosperms |
Which of the following species of tiger has not gone extinct?
| 1. | Bali | 2. | Javan |
| 3. | Caspian | 4. | Siberian |
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 |
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% |
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 |
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 |
The biodiversity hotspots in India include all the following except:
| 1. | Western Ghats and Sri Lanka | 2. | Indo-Burma |
| 3. | Himalayas | 4. | Deccan plateau |
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 |
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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