Q. No.Amongst the vertebrates, the Class with maximum number of species is:
1.
Pisces
2.
Reptilia
3.
Aves
4.
Mammalia
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At present, the most important cause driving animals and plants to extinction is:
| 1. | Co-extinctions | 2. | Alien species invasions |
| 3. | Over-exploitation | 4. | Habitat loss and fragmentation |
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The World Summit on Sustainable Development was held in:
| 1. | 1992 in Rio de Janeiro | 2. | 1971 in Ramsar |
| 3. | 2002 in Johannesburg | 4. | 1987 in Montreal |
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Identify the correct fact regarding the biodiversity hot spots in the world:
| 1. | The current total number is 25 and 3 of these cover India |
| 2. | The current total number is 25 and 2 of these cover India |
| 3. | The current total number is 34 and 3 of these cover India |
| 4. | The current total number is 34 and 2 of these cover India |
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If we consider invertebrates, the maximum global biodiversity, after insects, is seen in:
| 1. | Crustaceans | 2. | Echinoderms |
| 3. | Mollusks | 4. | Annelids |
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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.
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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 |
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Lantana camara and Clarias gariepinus are examples of:
| 1. | Invasive species | 2. | Apex predators |
| 3. | Critical link species | 4. | Edge species |
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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 |
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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.
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