| 1. | Connell | Competitive release |
| 2. | Gauss | Competitive exclusion principle |
| 3. | MacArthur | Resource partitioning |
| 4. | Tillman | Rivet popper hypothesis |
| 1. | Uttar Pradesh | 2. | Gujarat |
| 3. | Madhya Pradesh | 4. | Rajasthan |
| 1. | 2.4 % and 8.1 % | 2. | 1.7 % and 12 % |
| 3. | 2.1 % and 9.5 % | 4. | 3.4 % and 16 % |
| Extinct animal | Country/continent | ||
| A | Stellar’s sea cow | P | Australia |
| B | Thylacine | Q | Russia |
| C | Quagga | R | Mauritius |
| D | Dodo | S | Africa |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | S | R |
| 3 | R | S | P | Q |
| 4. | S | R | Q | P |
| I: | Among invertebrates maximum species richness is seen in insects |
| II: | Among vertebrates maximum species richness is seen in mammals |
| 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 % |
| 1. | Assam | 2. | Meghalaya |
| 3. | Manipur | 4. | Arunachal Pradesh |