According to Alexander von Humboldt :
1. | Species richness decreases with increasing area of exploration |
2. | Species richness increases with the increasing area, but only up to a limit |
3. | There is no relationship between species richness and the area explored |
4. | Species richness goes on increasing with increasing area of exploration |
In the following, in each set, a conservation approach and an example of a method of conservation are given.
(a) | In-situ conservation - Biosphere Reserve |
(b) | Ex-situ conservation - Sacred groves |
(c) | In-situ conservation - Seed bank |
(d) | Ex-situ conservation - Cryopreservation |
Select the option with the correct match of approach and method:
1. | (a) and (c) | 2. | (a) and (d) |
3. | (b) and (d) | 4. | (a) and (b) |
Sacred groves are especially useful in:
1. preventing soil erosion
2. year-round flow of water in rivers
3. conserving rare and threatened species
4. generating environmental awareness
Biodiversity of a geographical region represents:
1. | Species endemic to the region |
2. | Endangered species found in the region |
3. | The diversity in the organisms living in the region |
4. | Genetic diversity is present in the dominant species of the region. |
One of the most important functions of botanical gardens is that:
1. They allow ex-situ conservation of germplasm
2. They provide the natural habitat for wildlife
3. One can observe tropical plants there
4. They provide a beautiful area for recreation
Reason for elimination of wild life is:
1. Deforestation
2. Forest fire
3. Floods
4. Less Rain fall
Main reason for disturbance of biological diversity:
1. Greenhouse effect
2. Hunting
3. Soil erosion
4. Destruction of natural habitats
Best method to preserve the wild relatives of plants:
1. By growing them in natural habitats
2. Gene library
3. By storing seeds
4. Cryopreservation
Species diversity is maximum in:
1. Tropical rain forests
2. Temperate forests
3. Deserts
4. Hill slopes
The number of wildlife is continuously decreasing. What is the main reason for this:
1. Predation
2. Cutting down of forest
3. Destruction of habitat
4. Hunting