In the case of peppered moth (Biston betularia), the black-coloured form became dominant over the light-coloured form in England during the industrial revolution. This is an example of:
1. | natural selection, whereby the darker forms were selected |
2. | appearance of the darker coloured individuals due to very poor sunlight |
3. | protective mimicry |
4. | inheritance of darker colour character acquired due to the darker environment |
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The concept of chemical evolution is based on:
1. | crystallization of chemicals |
2. | interaction of water, air, and clay under intense heat |
3. | effect of solar radiation on chemicals |
4. | possible origin of life by a combination of chemicals under suitable environmental conditions |
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1. | They could separate combinations of molecules from the surroundings |
2. | They were able to reproduce |
3. | They were partially isolated from the surroundings |
4. | They could maintain an internal environment |
Select the correct statement from the following:
1. | Darwin variations are small and directionless |
2. | fitness is the end result of the ability to adapt and gets selected by nature |
3. | all mammals except whales and have seven cervical vertebrae |
4. | Mutations are random and directional |
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Evolution of different species in a given area starting from a point and spreading to other geographical areas is known as:
1. Adaptive radiation
2. Natural selection
3. Migration
4. Divergent evolution
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Genetic drift is most powerful in
1. changing environments
2. small populations
3. large populations
4. stable environments
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Which of the following is used as an atmospheric pollution indicator?
1. | Lepidoptera | 2. | Lichens |
3. | Lycopersicon | 4. | Lycopodium |
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Animal husbandry and plant breeding programmes are the examples of:
1. reverse evolution
2. artificial selection
3. mutation
4. natural selection
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Evolution of life shows that life forms had a trend of moving from:
1. land to water
2. dryland to wet land
3. fresh water to sea water
4. water to land
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