- 1(current)
Q. No.The Amazon Forest:
| I: | is a largely tropical rainforest in South Africa |
| II: | has the greatest biodiversity on Earth |
| III: | produces about 20% of total oxygen in the earth’s atmosphere through photosynthesis |
| 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: Biodiversity Patterns | Importance of Biodiversity | Loss of Biodiversity |
57%
From NCERT
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Colonisation of tropical Pacific Islands by humans have resulted in extinction of more than _____ 3 pecies of native birds.
1. 2000
2. 7000
3. 784
4. 15000
1. 2000
2. 7000
3. 784
4. 15000
Subtopic: Loss of Biodiversity |
59%
From NCERT
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Loss of biodiversity in a region may lead to
| a. | Increased variability in certain ecosystem processes. |
| b. | Lowered resistance to environmental perturbations. |
| c. | Decline in productivity. |
1. Only a is correct
2. Only a is incorrect
3. Only b and c
4. Both a and b are incorrect
2. Only a is incorrect
3. Only b and c
4. Both a and b are incorrect
Subtopic: Loss of Biodiversity |
From NCERT
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Consider the given two statements:
| Statement I: | That humans derive countless direct economic benefits from nature is the broadly utilitarian argument for the need to conserve biodiversity. |
| Statement II: | That biodiversity plays a major role in many ecosystem services that nature provides is the narrowly utilitarian argument for the need to conserve biodiversity. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Loss of Biodiversity |
58%
From NCERT
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How many of the given statements are true?
1. 1
2. 2
3. 3
4. 0
| I: | Amazon rain forest produces 20% of total oxygen in the Earth’s atmosphere |
| II: | All the biodiversity hotspots put together cover about 10 % of the Earth’s land area |
| III: | About 23 % of all species of gymnosperms in the world face the threat of extinction |
| IV: | India’s share of the global species diversity is about 2.4 % |
2. 2
3. 3
4. 0
Subtopic: Loss of Biodiversity |
From NCERT
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Consider the following statements regarding invasive species:
Choose the correct option:
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Neither Statement I nor Statement II is correct.
| Statement I: | The introduction of the Nile perch into Lake Victoria led to the extinction of several indigenous cichlid fish species. |
| Statement II: | All introduced species in a native ecosystem will become invasive. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Neither Statement I nor Statement II is correct.
Subtopic: Loss of Biodiversity |
57%
From NCERT
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- 1(current)
Q. No.
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