- 1(current)
Q. No.Match List-I with List-II
Choose the correct answer from the options given below.
| List-I | List-II | ||
| (a) | Adaptive radiation | (i) | Selection of antibiotic- resistant bacteria |
| (b) | Gene flow | (ii) | Australian marsupials |
| (c) | Evolution by anthropogenic action | (iii) | If gene migration happens multiple times |
| (d) | Convergent evolution | (iv) | Flippers of penguins and dolphins |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iv) | (iii) | (ii) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (ii) | (iii) | (i) | (iv) |
| 4. | (ii) | (i) | (iv) | (iii) |
Subtopic: Â Additional Theories of Darwin |Â Genetic Basis of Adaptation |
 92%
Level 1: 80%+
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| Assertion(A): | Sickle cell anaemia in malaria endemic area is an example of directional selection. |
| Reason(R): | Individuals for sickle cell anaemia have defective gene in X chromosomes. |
| 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 Darwin's Theory |Â Genetic Basis of Adaptation |
Level 3: 35%-60%
Hints
| Assertion(A): | Australian marsupials can be taken as an example of adaptive radiation. |
| Reason(R): | A number of marsupials, evolved from an ancestral stock, but all within the Australian island continent. |
| 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 Theory of Evolution & Lamarckism |Â Modern Theory of Evolution |Â Genetic Basis of Adaptation |
 79%
Level 2: 60%+
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| Assertion(A): | Evolution is not a directed process in the sense of determination. |
| Reason(R): | It is stochastic process based on chance events in nature and chance mutation in the organisms. |
| 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 Theory of Evolution & Lamarckism |Â Modern Theory of Evolution |Â Natural Selection |Â Genetic Basis of Adaptation |
 81%
Level 1: 80%+
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Assertion (A): In polluted environments, melanic moths were more selected by nature.
Reason (R): Melanic moths were able to camouflage themselves during industrialization.
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): Melanic moths were able to camouflage themselves during industrialization.
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 Concept of Isolation |Â Concept of Speciation |Â Genetic Basis of Adaptation |
 89%
Level 1: 80%+
Hints
Assertion (A): The resistant organisms/cells appear over a time scale of centuries.
Reason (R): Excess use of antibiotics has resulted in the selection of resistant varieties.
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): Excess use of antibiotics has resulted in the selection of resistant varieties.
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 Natural Selection |Â Concept of Speciation |Â Genetic Basis of Adaptation |
Level 3: 35%-60%
Hints
Assertion (A): There must be a genetic basis for getting selected and evolving.
Reason (R): Adaptive ability is inherited.
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): Adaptive ability is inherited.
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 Concept of Speciation |Â Genetic Basis of Adaptation |
 61%
Level 2: 60%+
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Assertion (A): deVries believed that mutation caused speciation.
Reason (R): The mutation causing speciation is known as saltation as per Darwin.
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): The mutation causing speciation is known as saltation as per Darwin.
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 Genetic Basis of Adaptation |
 77%
Level 2: 60%+
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- 1(current)
Q. No.
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