Assertion(A): Population ecology is an important area in Biology.
Reason(R): It links ecology to population genetics and evolution.
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. (A) is false, but (R) is true.
Subtopic: Â Population Attributes |
 85%
Level 1: 80%+
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Assertion(A): Prey species that are poisonous are avoided by predators.
Reason(R): This is one of the defense mechanisms evolved to lessen the impact of predation.
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. (A) is false, but (R) is true.
Reason(R): This is one of the defense mechanisms evolved to lessen the impact of predation.
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. (A) is false, but (R) is true.
Subtopic: Â Population Interactions: Predation |
Level 3: 35%-60%
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Assertion(A): Predation is more severe for plants.
Reason(R): They cannot run away from their predators.
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. (A) is false, but (R) is true.
Reason(R): They cannot run away from their predators.
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. (A) is false, but (R) is true.
Subtopic: Â Population Interactions: Predation |
 93%
Level 1: 80%+
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Assertion(A): Competition is defined as a process where the fitness of one species gets lower down due to the presence of another species.
Reason(R): An increase in the r-value of one species in the presence of another species represents competition.
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. (A) is false, but (R) is true.
Reason(R): An increase in the r-value of one species in the presence of another species represents competition.
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. (A) is false, but (R) is true.
Subtopic: Â Population Interactions: Competition |
 53%
Level 3: 35%-60%
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Consider the given statements:
| Assertion (A): | Temperature is the most important ecologically relevant environmental factor. |
| Reason (R): | Temperature affects the kinetics of the enzymes. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and the (R) correctly explains the (A). |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
 84%
Level 1: 80%+
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The interaction where one species is benefitted and the other is neither benefitted nor harmed is called:
| 1. | mutualism | 2. | commensalism |
| 3. | competition | 4. | amensalism |
Subtopic: Â Population Interactions: Commensalism, Protocooperation & Mutualism |
 91%
Level 1: 80%+
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 86%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | Very small animals are rarely found in polar regions. |
| Reason (R): | Small animals have a larger surface area relative to their volume. |
| 1. | Both (A) and (R) are true and (R) correctly explains the (A). |
| 2. | (A) is true but (R) is false. |
| 3. | Both (A) and (R) are false. |
| 4. | Both (A) and (R) are true but (R) does not correctly explain the (A). |
 84%
Level 1: 80%+
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If the population pyramid of an associated population has an extremely broad base, it is:
| 1. | a rapidly expanding population |
| 2. | a stable population |
| 3. | a population where there were more old individuals than young individuals |
| 4. | a population with more males than females |
Subtopic: Â Population Attributes |
 83%
Level 1: 80%+
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A constant internal environment, in spite of an ever-changing external environment, cannot be maintained by:
| 1. | 10 per cent of animals and some plants |
| 2. | 50 per cent of animals and nearly all plants |
| 3. | 99 per cent of animals and nearly all plants |
| 4. | 100 per cent of animals and nearly 1 per cent of plants |
 83%
Level 1: 80%+
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