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Q. No.A stable community in an ecosystem:
I:
should show a considerable increase in productivity every year
II:
must be either resistant or resilient to occasional man-made and natural disturbances
III:
must be resistant to invasions by alien species
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
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Importance of Biodiversity |
From NCERT
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The Earth Summit was held in:
1. Montreal, 1987
2. Kyoto, 1997
3. Rio de Janeiro, 1992
4. Johannesburg, 2002
1. Montreal, 1987
2. Kyoto, 1997
3. Rio de Janeiro, 1992
4. Johannesburg, 2002
Subtopic: Ex Situ Conservation of Biodiversity |
90%
From NCERT
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Consider the given two statements:
| Statement I: | The Earth Summit held in Rio de Janeiro in 1992 was called for the conservation of biodiversity and sustainable utilization of its benefits. |
| Statement II: | The World Summit on sustainable development held in 2002 in Johannesburg, South Africa pledged for a significant reduction in the current rate of biodiversity loss at global, regional and local levels by 2010. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Biodiversity Conservation |
88%
From NCERT
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Consider the given statements:
| Statement I: | The most important cause today for animals and plants being driven to extinction is over-exploitation by human beings. |
| Statement II: | Conserving biodiversity hotspots is an Ex-situ method of conservation of threatened animals and plants. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Loss of Biodiversity | In Situ Conservation of Biodiversity | Ex Situ Conservation of Biodiversity |
55%
From NCERT
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Which of the following is correct for r-selected species?
1. Large number of progeny with small size
2. Large number of progeny with large size
3. Small number of progeny with small size
4. Small number of progeny with large size
1. Large number of progeny with small size
2. Large number of progeny with large size
3. Small number of progeny with small size
4. Small number of progeny with large size
Subtopic: Magnitude of Biodiversity |
74%
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The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year :
| 1. | 2002 | 2. | 1985 |
| 3. | 1992 | 4. | 1986 |
Subtopic: Ex Situ Conservation of Biodiversity |
80%
From NCERT
NEET - 2023
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Among 'The Evil Quartet', which one is considered the most important cause driving extinction of species?
1. Co-extinctions
2. Habitat loss and fragmentation
3. Over exploitation for economic gain
4. Alien species invasions
1. Co-extinctions
2. Habitat loss and fragmentation
3. Over exploitation for economic gain
4. Alien species invasions
Subtopic: Loss of Biodiversity |
83%
From NCERT
NEET - 2023
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In 'rivet popper hypothesis', Paul Ehrlich compared the rivets in an airplane to
| 1. | species within a genus | 2. | genetic diversity |
| 3. | ecosystem | 4. | genera within a family |
Subtopic: Importance of Biodiversity |
65%
From NCERT
NEET - 2023
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The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _______.
| 1. | alien species | 2. | endemic species |
| 3. | exotic species | 4. | keystone species |
Subtopic: Importance of Biodiversity |
62%
NEET - 2023
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Which of the following is/are cause(s) of biodiversity losses?
1. Over-exploitation, habitat loss and fragmentation
2. Climate change only
3. Over-exploitation only
4. Habitat loss and fragmentation only
1. Over-exploitation, habitat loss and fragmentation
2. Climate change only
3. Over-exploitation only
4. Habitat loss and fragmentation only
Subtopic: Loss of Biodiversity |
89%
From NCERT
NEET - 2023
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