Q. No.Subtopic: Loss of Biodiversity |
88%
Level 1: 80%+
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In contemporary times, which of the following is the major reason that is driving species to extinction?
1. Habitat loss and fragmentation
2. Alien species invasion
3. Overexploitation
4. Co-extinction
1. Habitat loss and fragmentation
2. Alien species invasion
3. Overexploitation
4. Co-extinction
Subtopic: Loss of Biodiversity |
87%
Level 1: 80%+
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Consider the given three statements:
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
| I: | The current mass extinction of species is the ‘Sixth Extinction’. |
| II: | The current species extinction rates are estimated to be 100 to 1,000 times faster than in the pre-human times. |
| III: | Our activities are responsible for the faster rates. |
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
Subtopic: Loss of Biodiversity |
92%
Level 1: 80%+
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The largest extinct carnivore marsupial, thylacine, was a native of:
1. Brazil
2. South Africa
3. Peru
4. Australia
1. Brazil
2. South Africa
3. Peru
4. Australia
Subtopic: Loss of Biodiversity |
86%
Level 1: 80%+
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What percentage of all species on earth might be wiped out within the next 100 years if the present trends in 6th mass extinction were to continue?
1. 10
2. 25
3. 50
4. 90
1. 10
2. 25
3. 50
4. 90
Subtopic: Loss of Biodiversity |
70%
Level 2: 60%+
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The consequences of loss of biodiversity is least likely to result in:
1. decline in primary production
2. increased resistance to environmental perturbance
3. increased variability in water use
4. increased variability in pest and disease cycle
1. decline in primary 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 |
63%
Level 2: 60%+
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In the Indian context, Lantana camara and Eichhornia crassipes are:
1. Critical link species
2. Keystone species
3. Cash crops
4. Invasive species
1. Critical link species
2. Keystone species
3. Cash crops
4. Invasive species
Subtopic: Loss of Biodiversity |
93%
Level 1: 80%+
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| Assertion (A): | When certain exotic species are introduced into a geographical area, they become invasive and start spreading fast. |
| Reason (R): | These exotic species invariably reproduce by asexual means. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Loss of Biodiversity |
65%
Level 2: 60%+
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How many of the given statements regarding recent extinctions are true?
| I: | Dodo got extinct from Mauritius |
| II: | Quagga got extinct from Africa |
| III: | Thylacine got extinct from Australia |
| IV: | Stellar's sea cow got extinct from Russia |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Loss of Biodiversity |
89%
Level 1: 80%+
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What led to the extinction of passenger pigeon?
1. Increased number of predatory birds.
2. Over exploitation by humans.
3. Habitat loss
4. H5N1 virus infection.
1. Increased number of predatory birds.
2. Over exploitation by humans.
3. Habitat loss
4. H5N1 virus infection.
Subtopic: Loss of Biodiversity |
87%
Level 1: 80%+
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