Industrial melanism is an example of
| 1. | defensive adaptation of skin against ultraviolet radiations |
| 2. | drug resistance |
| 3. | directional selection due to smoke from industries |
| 4. | protective resemblance with the surroundings |
Subtopic: Â Genetic Basis of Adaptation |
 67%
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If a new allele suddenly becomes very abundant in a population, most likely it is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
Subtopic: Â Genetic Basis of Adaptation |
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Industrial melanism as observed in peppered moth proves that :
| 1. | the true black melanic forms arises by a recurring random mutation. |
| 2. | The melanic form of the moth has no selective advantage over lighter form in industrial area |
| 3. | The lighter-form of the moth has no selective adavantage either in polluted industrial area or non-polluted area |
| 4. | Melanism is a pollution- generated feature. |
Subtopic: Â Genetic Basis of Adaptation |
NEET - 2007
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Which of the following statements is correct?
| 1. | Lion and leopard show convergent evolution |
| 2. | Cryptic camouflage is seen in Biston betularia. |
| 3. | Natural selection is responsible for the extinction of dinosaurs |
| 4. | Homo habilis and Homo erectus are closely related. |
Subtopic: Â Genetic Basis of Adaptation |
AIIMS - 2011
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Which of the following conclusions is from industrial melanism?
| 1. | Camouflage causes the white moths to get caught by predators more even in rural areas during industrialisation. |
| 2. | During industrialisation, white variant of moths got wiped out completely in urban areas. |
| 3. | During industrialisation, lichen will increase in number. |
| 4. | In a mixed population, those that can better adapt, survive and increase in population size. |
Subtopic: Â Genetic Basis of Adaptation |
 64%
From NCERT
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Which one of the following is not a living fossil?
1. King crab
2. Sphenodon
3. Archaeopteryx
4. Peripatus
Subtopic: Â Concept of Speciation |Â Genetic Basis of Adaptation |
 54%
AIPMT - 2006
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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%
From NCERT
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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: Â Natural Selection |Â Concept of Speciation |Â Genetic Basis of Adaptation |
From NCERT
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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: Â Concept of Speciation |Â Genetic Basis of Adaptation |
 61%
From NCERT
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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%
From NCERT
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