1. | Biodiversity is the term popularised by the sociobiologist Edward Wilson to describe the combined diversity at all levels of biological organisation. |
2. | IUCN stands for International Union for Conservation of Nature and Natural resources. |
3. | Robert May places the global species diversity in the range of 20 to 50 million. |
4. | More than 25 percent of the drugs currently sold in the market are derived from the plants. |
I | Narrowly utilitarian argument for conserving biodiversity | Humans derive countless direct benefits from nature. |
II. | Broadly utilitarian argument for conserving biodiversity | We owe to millions of plant, animal and microbe species with whom we share this planet |
III. | Ethical argument for conserving biodiversity | Biodiversity plays a major role in many ecosystem services that nature provides |
On a logarithmic scale, the species-area relationship turns out to be a:
1. | Straight line | 2. | Rectangular hyperbola |
3. | Bell shaped | 4. | U shaped |
Consider the given two statements:
I: | Fragmentation of habitat is an important cause of extinction of species. |
II: | Minor fluctuations in climate, resources or other factors can be catastrophic in small, isolated populations. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. I is incorrect but II is correct.
Sacred groves, found in Khasi and Jaintia Hills, are located in the Indian state of:
1. | Arunachal Pradesh | 2. | Chhattisgarh |
3. | Meghalaya | 4. | West Bengal |
Which of the following is not an ex-situ method for conservation of biodiversity?
1. | Seed banks | 2. | Zoological parks |
3. | Sacred groves | 4. | Cryopreservation of gametes |
The name of Alexander von Humboldt is associated with the concept of:
1. | Increased species diversity in stable communities |
2. | Parallelism between evolution and ecological succession |
3. | Resource-partitioning to avoid competition |
4. | Species-Area relationship |
Lantana camara and Clarias gariepinus are examples of:
1. | Invasive species | 2. | Apex predators |
3. | Critical link species | 4. | Edge species |
All the following describe a stable biological community except:
1. | It should always show a significant increase in productivity from year to year |
2. | It must be either resilient or resistant to occasional natural disturbances |
3. | It must be either resilient or resistant to occasional man-made disturbances |
4. | It must be resistant to invasion by alien species |
Consider the two statements:
I: | Species diversity seen in tropical areas is much lower than that seen in temperate areas. |
II: | Temperate areas, unlike tropical areas are less seasonal, more constant and promote niche specialization. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. Both I and II are incorrect.