Q. No.Genetic Drift occurs due to :
1. Natural selection
2. Sudden population migration
3. Continuous gene migration
4. Mutation
Select the correct match regarding adaptive radiation of Australian marsupials corresponding to placental mammals
1. Numbat-Flying Squirrel
2. Tasmanian Wolf - Bobcat
3. Marsupial mouse- Mole
4. Spotted Cuscus - Lemur
| 1. | Creation of life from dead and decaying matter |
| 2. | Creation of life from chemicals |
| 3. | Origin of sperm in human testes |
| 4. | Transfer of spores as unit of life from other planets of Earth |
| 1. | This theory was proposed by Alfred Wallace |
| 2. | Variations are small directional changes |
| 3. | Single step large mutation is a cause of speciation |
| 4. | Large differences due to mutations arise gradually in a population |
A population will not exist in Hardy-Weinberg equilibrium if:
1. Individuals mate selectively
2. There are no mutations
3. There is no migration
4. The population is large
The factor that leads to Founder effect in a population is:
1. Mutation
2. Genetic drift
3. Natural selection
4. Genetic recombination
Variations caused by mutation, as proposed by Hugo de Vries, are:
1. small and directionless
2. random and directional
3. random and directionless
4. small and directional
In present times, the origin of life is not possible from inorganic compounds due to:
1. Non-availability of raw material
2. High concentration of O2 in the atmosphere
3. Decrease in temperature
4. Excess of pollution
Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?
| 1. | Overproduction, variations, constancy of population size, natural selection |
| 2. | Variations, constancy of population size, overproduction, natural selection |
| 3. | Overproduction, constancy of population size, variations, natural selection |
| 4. | Variations, natural selection, overproduction, constancy of population size |
In the case of peppered moth (Biston betularia), the black-colored form became dominant over the light-colored form in England during the industrial revolution. This is an example of:
| 1. | Inheritance of darker color character acquired due to the darker environment. |
| 2. | Natural selection whereby the darker forms were selected. |
| 3. | Appearance of the dark-colored individuals due to very poor sunlight |
| 4. | Protective mimicry |
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