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Q. No.Assertion(A): A species shows a dramatic increase in its population when its competing species is removed.
Reason(R): The competing species is competitively superior species.
Choices for Assertions and reasons:
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: Population Interactions: Competition |
Level 3: 35%-60%
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| Assertion (A): | The life cycles of endoparasites are more complex. |
| Reason (R): | Endoparasites have very less specialization. |
| 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: Population Interactions: Parasitism |
73%
Level 2: 60%+
Hints
| Assertion(A): | Egrets always forage close to cattle. |
| Reason(R): | They depend on cattle's movement by which soil insects get stirred up & flushed out and egrets get their food (soil insects) easily. |
Choices for Assertions and reasons:
| 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: Population Interactions: Commensalism, Protocooperation & Mutualism |
93%
Level 1: 80%+
Hints
| 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: Population Attributes |
88%
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: Population Interactions: Predation |
Level 3: 35%-60%
Hints
Consider the given two statements:
| 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) explains (A). |
| 2. | Both (A) and (R) are True but (R) does not explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Population Interactions: Predation |
93%
Level 1: 80%+
Hints
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: Population Interactions: Competition |
52%
Level 3: 35%-60%
Hints
| Assertion (A): | Plants are more affected by their predators compared to animals. |
| Reason (R): | Plants cannot run away from their predators while animals can. |
Choices for Assertions and reasons:
| 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: Population Interactions: Predation |
93%
Level 1: 80%+
Hints
Assertion(A): Monarch butterfly is highly tasteful to its predator.
Reason(R): It has a special chemical that is acquired in its caterpillar stage.
Choices for Assertions and reasons:
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): It has a special chemical that is acquired in its caterpillar stage.
Choices for Assertions and reasons:
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: Population Interactions: Predation |
70%
Level 2: 60%+
Hints
| Assertion (A): | In a field experiment, when all the starfish were removed from an enclosed intertidal area, more than 10 species of invertebrates became extinct within a year. |
| Reason (R): | This happened due to intraspecific 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: Population Interactions: Competition |
58%
Level 3: 35%-60%
Hints
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