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Q. No.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A):
For competition to occur between species, resources must be limited.
Reason (R):
Totally unrelated species cannot compete for the same resources.
In the light of the above statements, choose the most appropriate answer from the options given below :
1.
Both (A) and (R) are True and (R) is the correct explanation of (A).
2.
Both (A) and reason 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: Population Interactions: Competition |
51%
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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): | The newly acquired predators and parasites are often more damaging than the older ones. |
| Reason (R): | The older ones are familiar and the species getting affected have adjusted. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Population Interactions: Predation | Population Interactions: Parasitism |
73%
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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): | Mammals with smaller body size find thermoregulation more challenging than those with larger body size. |
| Reason (R): | Mammals with smaller body size are ectotherms and mammals with larger body size are endotherms. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
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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): | In every species, there are trade-offs between survival and reproductive traits. |
| Reason (R): | Life history traits are products of natural selection. |
| 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: Introduction to the Chapter |
54%
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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): | The human population is no longer growing exponentially but is still increasing rapidly. |
| Reason (R): | Most countries of the world have undergone a demographic transition. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Introduction to Ecology |
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Assertion: Parasitoidism is a strategy that is actually closer to predation.
Reason: A parasitoid is an organism that lives in close association with its host and at the host's expense, and which sooner or later kills it.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Population Interactions: Predation | Population Interactions: Parasitism |
65%
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‘Realized niche’ of an organism can be best described as:
| 1. | the area a species can occupy in the face of exploitive competition |
| 2. | the habitat of a species within a community resulting from clumping |
| 3. | the habitat that exists in nature as opposed to the ideal |
| 4. | the life pattern that the organism actually assumes |
Subtopic: Introduction to Ecology |
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The competitive exclusion principle can be best expressed as:
| 1. | the more abundant species will exclude the less abundant species through competition |
| 2. | competition for the same resources excludes species having different lifestyles |
| 3. | no two species can occupy the same niche indefinitely when resources are limited |
| 4. | larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush |
Subtopic: Population Interactions: Competition |
72%
From NCERT
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Whale barnacles attach typically to baleen whales without harming them. This relationship is called as:
| 1. | vitalism | 2. | mutualism |
| 3. | parasitism | 4. | commensalism |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
85%
From NCERT
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A parasitism that does not involve feeding on the body of the host is:
| 1. | ectoparasitism | 2. | endoparasitism |
| 3. | parasitoids | 4. | brood parasitism |
Subtopic: Population Interactions: Parasitism |
83%
From NCERT
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