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Q. No.Who proposed that speciation occurs through single-step large mutations, a process termed as saltation?
1. Hugo de Vries
2. Charles Darwin
3. Alfred Wallace
4. Gregor Mendel
1. Hugo de Vries
2. Charles Darwin
3. Alfred Wallace
4. Gregor Mendel
Subtopic: Â Mechanism of Evolution |
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Level 1: 80%+
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Evolution for Darwin was gradual while deVries believed mutation caused speciation and hence called it:
1. Saltation
2. Natural selection
3. Genetic drift
4. Adaptive radiation
1. Saltation
2. Natural selection
3. Genetic drift
4. Adaptive radiation
Subtopic: Â Mechanism of Evolution |
 92%
Level 1: 80%+
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Consider the given two statements:
| Assertion (A): | Mutation can lead to variation in a population and drive evolutionary changes. |
| Reason (R): | Mutations are always directional and result in advantageous traits that improve survival. |
| 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 Mechanism of Evolution |
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Level 1: 80%+
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