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Q. No.Read the following statements :
(i)
Diversifying (disruptive) selection is a mode of natural selection that favours variants of opposite extremes over intermediate forms
(ii)
In the evolution of life on Earth, the early primitive cells that were present must have obtained their energy by glycolysis and fermentation
(iii)
Darwin's theory of evolution was highly influenced by the Mendel's crossing experiments with peas
(iv)
Hardy-Weinberg's principle can be used to interpret whether evolution has occurred in a population or not
(v)
The half-life of carbon-14 is approximately 5730 years
Which of the above statements are correct?
1. (i), (ii)
2. (iii), (iv)
3. (ii), (iii), (iv), (v)
4. (i), (ii), (iv), (v)
Subtopic: Examples of Chemical Evolution | Darwin's Theory | Summary of Darwin's Theory | Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | A BRIEF ACCOUNT OF EVOLUTION |
74%
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Which of the following is appropriately related to genetic drift phenomenon?
I. Chance occurrence
II. Directional
III. Random change in allele frequency
IV. Fixation or elimination of alleles
1. I, II, III, IV
2. I, III, IV
3. III and IV only
4. I and II only
I. Chance occurrence
II. Directional
III. Random change in allele frequency
IV. Fixation or elimination of alleles
1. I, II, III, IV
2. I, III, IV
3. III and IV only
4. I and II only
Subtopic: Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
66%
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| Assertion (A): | Big bang theory says that the universe is still expanding. |
| Reason (R): | The expansion of the universe caused the decrease in temperature. |
| 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: Cosmic Evolution |
54%
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| Assertion (A): | According to Darwin, fitness means reproductive fitness. |
| Reason (R): | Those who are a better fit in the environment will leave more progenies. |
| 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: Darwin's Theory | Summary of Darwin's Theory | Modern Theory of Evolution |
88%
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| Assertion (A): | The new forms of life have arisen at different times in the history of the earth. |
| Reason (R): | Studies showed that life forms varied over time and certain life forms are restricted to certain geological timespans. |
| 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: Concept of Organic Evolution: Evidence |
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| Assertion (A): | In convergent evolution, the same structure developed in animals along different directions due to adaptations to different needs. |
| Reason (R): | Homologous structures have similar anatomy but perform different functions. |
| 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: Concept of Organic Evolution: Evidence |
66%
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Assertion (A): Analogous structures are a result of convergent evolution.
Reason (R): In convergent evolution, different structures evolve for the same function.
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): In convergent evolution, different structures evolve for the same function.
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: Concept of Organic Evolution: Evidence |
87%
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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: Concept of Isolation | Concept of Speciation | Genetic Basis of Adaptation |
89%
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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: Natural Selection | Concept of Speciation | Genetic Basis of Adaptation |
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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: Concept of Speciation | Genetic Basis of Adaptation |
61%
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