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Q. No.Extinction of Stellar’s sea cow and passenger pigeon was due to:
1.
Habitat loss and fragmentation
2.
Over exploitation
3.
Invasion of alien species
4.
Co-extinctions
Subtopic: Loss of Biodiversity |
85%
Level 1: 80%+
Hints
Loss of biodiversity may lead to all except:
| 1. | decline in plant production |
| 2. | increased resistance to environmental perturbance |
| 3. | increased variability in water use |
| 4. | increased variability in pest and disease cycle |
Subtopic: Loss of Biodiversity |
73%
Level 2: 60%+
Hints
Which group, amongst the following, has the maximum percentage of species facing threat of extinction?
| 1. | Amphibians | 2. | Birds |
| 3. | Mammals | 4. | Gymnosperms |
Subtopic: Loss of Biodiversity |
79%
Level 2: 60%+
Hints
Which of the following species of tiger has not gone extinct?
| 1. | Bali | 2. | Javan |
| 3. | Caspian | 4. | Siberian |
Subtopic: Loss of Biodiversity |
89%
Level 1: 80%+
Hints
Which of the following is not a reason that accounts for greater biodiversity of tropics?
| 1. | availability of more solar energy |
| 2. | more niche specialization |
| 3. | more time for species diversification |
| 4. | large seasonal variations in environmental factors |
Subtopic: Biodiversity Patterns |
79%
Level 2: 60%+
Hints
Although, India has only 2.4 % of world’s area, its share of global species diversity is about:
| 1. | 3% | 2. | 5% |
| 3. | 8% | 4. | 11% |
Subtopic: Introduction & Types |
91%
Level 1: 80%+
Hints
Approximately, what number of species have been identified, named and studied?
| 1. | 1.0 million | 2. | 1.5 million |
| 3. | 1.7 million | 4. | 2.0 million |
Subtopic: Introduction & Types |
55%
Level 3: 35%-60%
Hints
The greatest biodiversity on the earth is found in:
| 1. | African grasslands |
| 2. | Amazonian rain forest in South America |
| 3. | Western Ghats in India |
| 4. | Nile delta in Egypt |
Subtopic: Biodiversity Patterns |
94%
Level 1: 80%+
Hints
The biodiversity hotspots in India include all the following except:
1. Western Ghats and Sri Lanka
2. Indo-Burma
3. Himalayas
4. Deccan plateau
1. Western Ghats and Sri Lanka
2. Indo-Burma
3. Himalayas
4. Deccan plateau
Subtopic: In Situ Conservation of Biodiversity | Biodiversity Conservation |
92%
Level 1: 80%+
Hints
What percent of earth’s area is covered by hotspots of biodiversity?
| 1. | less than 2 | 2. | about 7 |
| 3. | about 11 | 4. | more than 16 |
Subtopic: In Situ Conservation of Biodiversity |
84%
Level 1: 80%+
Hints
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