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
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
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.
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.
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.
Which one of the following is not a living fossil?
1. King crab
2. Sphenodon
3. Archaeopteryx
4. Peripatus
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): 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): 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): 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.
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