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Q. No.Consider the two statements:
Assertion (A):
Removal of a keystone species from a community affects community structure significantly.
Reason (R):
Keystone species are always the apex predators in an ecosystem.
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.
(A) is True but (R) is False.
4.
Both (A) and (R) are False.
Subtopic: Loss of Biodiversity |
55%
From NCERT
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All the following are ‘ex-situ’ methods for conservation of biodiversity except:
1. Zoological parks
2. Botanical gardens
3. Wildlife safari parks
4. National parks
1. Zoological parks
2. Botanical gardens
3. Wildlife safari parks
4. National parks
Subtopic: In Situ Conservation of Biodiversity | Ex Situ Conservation of Biodiversity |
80%
From NCERT
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Consider the two statements:
| Assertion (A): | The ‘Sixth Extinction’ presently in progress is different from the previous episodes of species extinction. |
| Reason (R): | The current species extinction rates are estimated to be 100 to 1,000 times faster than in the pre-human times |
| 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 False but (R) is True. |
| 4. | (A) is True but (R) is False. |
Subtopic: Loss of Biodiversity |
86%
From NCERT
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Consider the given two statements:
| Statement I: | The broadly utilitarian argument for conserving biodiversity says that humans derive countless direct economic benefits from nature. |
| Statement II: | The ethical argument for conserving biodiversity says that biodiversity plays a major role in many ecosystem services that nature provides. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is correct; Statement II is correct |
Subtopic: Biodiversity Conservation |
From NCERT
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Consider the given two statements:
| Statement I: | More than 25% of the drugs currently sold in the market worldwide are derived from plants. |
| Statement II: | Amazon forest is estimated to produce, through photosynthesis 5 % of the total oxygen in the earth’s atmosphere. |
| 1. | Statement I is incorrect; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is correct; Statement II is correct |
Subtopic: Biodiversity Conservation |
86%
From NCERT
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What will be true for proportionate number of species representing global biodiversity?
| 1. | The number of lichens is much more than the number of algae |
| 2. | The number of mosses is much less than the number of ferns and allies |
| 3. | The number of angiosperms is equal to the number of gymnosperms |
| 4. | The number of fungi is much more than the number of algae, ferns and allies, mosses and lichens put together |
Subtopic: Magnitude of Biodiversity |
90%
From NCERT
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The name of Alexander von Humboldt is associated with:
1. the concept of competitive release
2. Rivet popper hypothesis
3. the concept of Species area relationship
4. Ecological sanitation
1. the concept of competitive release
2. Rivet popper hypothesis
3. the concept of Species area relationship
4. Ecological sanitation
Subtopic: Biodiversity Patterns |
92%
From NCERT
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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
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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