- 1(current)
Q. No.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | There is a steady increase in species richness from the arctic to the tropics. |
| Reason (R): | Seasonal variation is substantially more in tropics than in arctics. |
| 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: Â Biodiversity Patterns |
 64%
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Regarding the gradients of biodiversity:
| I: | As we move from poles to the equator, broadly speaking, biodiversity decreases. |
| II: | There is an increase in species diversity from lower to higher altitudes. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Â Biodiversity Patterns |
 77%
From NCERT
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The greatest biodiversity on the earth is found in:
| 1. | African grasslands |
| 2. | Amazonian rain forest in South America |
| 3. | Western Ghats in India |
| 4. | Nile delta in Egypt |
Subtopic: Â Biodiversity Patterns |
 93%
From NCERT
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Which of the following is not a reason that accounts for greater biodiversity of tropics?
| 1. | availability of more solar energy |
| 2. | more niche specialization |
| 3. | more time for species diversification |
| 4. | large seasonal variations in environmental factors |
Subtopic: Â Biodiversity Patterns |
 79%
From NCERT
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Consider the two statements:
| I: | Species diversity seen in tropical areas is much lower than that seen in temperate areas. |
| II: | Temperate areas, unlike tropical areas are less seasonal, more constant and promote niche specialization. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. Both I and II are incorrect.
Subtopic: Â Biodiversity Patterns |
 79%
From NCERT
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The name of Alexander von Humboldt is associated with the concept of:
| 1. | Increased species diversity in stable communities |
| 2. | Parallelism between evolution and ecological succession |
| 3. | Resource-partitioning to avoid competition |
| 4. | Species-Area relationship |
Subtopic: Â Biodiversity Patterns |
 94%
From NCERT
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All the following describe a stable biological community except:
| 1. | It should always show a significant increase in productivity from year to year |
| 2. | It must be either resilient or resistant to occasional natural disturbances |
| 3. | It must be either resilient or resistant to occasional man-made disturbances |
| 4. | It must be resistant to invasion by alien species |
Subtopic: Â Biodiversity Patterns |
 57%
From NCERT
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- 1(current)
Q. No.
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