1. | 2002 | 2. | 1985 |
3. | 1992 | 4. | 1986 |
1. | species within a genus | 2. | genetic diversity |
3. | ecosystem | 4. | genera within a family |
1. | alien species | 2. | endemic species |
3. | exotic species | 4. | keystone species |
Statement I: | The most important cause today for animals and plants being driven to extinction is over-exploitation by human beings. |
Statement II: | Conserving biodiversity hotspots is an Ex-situ method of conservation of threatened animals and plants. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is correct |
Statement I: | The Earth Summit held in Rio de Janeiro in 1992 was called for the conservation of biodiversity and sustainable utilization of its benefits. |
Statement II: | The World Summit on sustainable development held in 2002 in Johannesburg, South Africa pledged for a significant reduction in the current rate of biodiversity loss at global, regional and local levels by 2010. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is correct |
A stable community in an ecosystem:
I: | should show a considerable increase in productivity every year |
II: | must be either resistant or resilient to occasional man-made and natural disturbances |
III: | must be resistant to invasions by alien species |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct