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Q. No.The sixth mass extinction differs from previous ones because it is primarily caused by:
| 1. | Volcanic eruptions |
| 2. | Human activities like habitat destruction and climate change |
| 3. | Asteroid impacts |
| 4. | Natural selection |
Subtopic: Loss of Biodiversity |
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Level 1: 80%+
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Which of the following areas on Earth has the greatest biodiversity?
1. Amazonian rain forest in South America
2. Sub Saharan Africa
3. South East Asia
4. Australian continent
1. Amazonian rain forest in South America
2. Sub Saharan Africa
3. South East Asia
4. Australian continent
Subtopic: Biodiversity Patterns |
98%
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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: Magnitude of Biodiversity |
87%
Level 1: 80%+
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Which of the following forests is known as the "Lungs of the planet Earth?
| 1. | Taiga forest |
| 2. | Tundra forest |
| 3. | Amazon rain forest |
| 4. | Rainforests of North-East India |
Subtopic: Loss of Biodiversity |
98%
Level 1: 80%+
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Nile perch, Carrot grass and Water hyacinth are all examples of:
1. Keystone species
2. Ecotypes
3. Sibling species
4. Invasive species
1. Keystone species
2. Ecotypes
3. Sibling species
4. Invasive species
Subtopic: Loss of Biodiversity |
90%
Level 1: 80%+
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Rivet popper hypothesis – a famous analogy in ecological studies – was given by:
1. Sigma Aldrich
2. Paul Ehrlich
3. Connell
4. Constanza
1. Sigma Aldrich
2. Paul Ehrlich
3. Connell
4. Constanza
Subtopic: Magnitude of Biodiversity |
97%
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Currently the most important cause driving animals and plants to extinction is:
1. Habitat loss and fragmentation
2. Alien species invasions
3. Over-exploitation
4. Co-extinctions
1. Habitat loss and fragmentation
2. Alien species invasions
3. Over-exploitation
4. Co-extinctions
Subtopic: Loss of Biodiversity |
90%
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Subtopic: Loss of Biodiversity |
96%
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According to Robert May, what is the estimated global species diversity?
1. 20–50 million
2. 10 million
3. 7 million
4. 5 million
1. 20–50 million
2. 10 million
3. 7 million
4. 5 million
Subtopic: Introduction & Types | Biodiversity |
95%
Level 1: 80%+
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Which of the following feature(s) should be shown by a stable community?
| 1. | Resistant to invasion of alien species |
| 2. | Resistant to occasional disturbances |
| 3. | Less variation in year-to-year productivity |
| 4. | All of these |
Subtopic: Importance of Biodiversity |
96%
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