Biodiversity hotspots are characterized by:
| 1. | High number of endemic species and low threat of extinction |
| 2. | Low number of endemic species and low threat of extinction |
| 3. | Low number of endemic species and high threat of extinction |
| 4. | High number of endemic species and high threat of extinction |
A taxon is considered “critically endangered” if it faces a high risk of extinction in the wild in:
| 1. | immediate future | 2. | near future |
| 3. | medium-term future | 4. | distant future |
| 1. | Amazon rain forest produces 20% of total oxygen in the Earth’s atmosphere |
| 2. | All the biodiversity hotspots put together cover about 10 % of the Earth’s land area |
| 3. | About 31 % of all gymnosperms species in the world face the threat of extinction |
| 4. | India’s share of the global species diversity is about 8.1 % |
The total number of biodiversity hotspots in the world is:
| 1. | 25 | 2. | 17 |
| 3. | 34 | 4. | 51 |