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 |
Consider the following statements regarding hotspots of biodiversity:
I. | They are characterized by high endemism and high threat of extinction. |
II. | Three of the 34 hotspots in the world cover India. |
III. | All biodiversity hotspots cover about 10% of the world area. |
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.
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.
If we consider invertebrates, the maximum global biodiversity, after insects, is seen in:
1. | Crustaceans | 2. | Echinoderms |
3. | Mollusks | 4. | Annelids |