Q. No.Adaptive radiations refers to
1. Power of adaptation in an individual to a variety of environments.
2. Adaptations due to geographical isolation.
3. Evolution of different species from a common ancestor.
4. Migration of members of a species to different geographical areas.
1. Power of adaptation in an individual to a variety of environments.
2. Adaptations due to geographical isolation.
3. Evolution of different species from a common ancestor.
4. Migration of members of a species to different geographical areas.
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The finches of Galapagos islands provide evidence in favor of
1. Biographical evolution
2. Special creation
3. Evolution due to mutation
4. Retrogressive evolution
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One of the important consequences of geographical isolation is:
| 1. | Random creation of new species |
| 2. | No change in the isolated fauna |
| 3. | Preventing speciation |
| 4. | Speciation through reproductive isolation |
Select the correct statement from the following:
| 1. | Mutations are random and directional. |
| 2. | Darwinian variations are small and directionless. |
| 3. | Fitness is the end result of the ability to adapt and get selected by nature. |
| 4. | All mammals except whales and camels have seven cervical vertebrae. |
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Amongst the human ancestors the brain size was more than 1000 cc in
1. Homo habilis
2. Homo neanderthalensis
3. Homo erectus
4. Ramapithecus
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The concept of chemical evolution is based on:
| 1. | Possible origin of life by a combination of chemicals under suitable environmental conditions. |
| 2. | Crystallization of chemicals |
| 3. | Interaction of water, air, and clay under intense heat |
| 4. | Effect of solar radiation on chemicals |
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Thorn of Bougainvillea and tendril of Cucurbita are examples of:
| 1. | Retrogressive evolution | 2. | Analogous organs |
| 3. | Homologous organs | 4. | Vestigial organs |
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Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
1. Wings of honey bee and wings of crow - Homologous organs
2. Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
3. Nictitating membrane and blind spot in human eye - Vestigial organs
4. Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
1. They could maintain an internal environment
2. They were able to reproduce
3. They could separate combinations of molecules from the surroundings.
4. They were partially isolated from the surroundings.
Which one of the following scientists' names is correctly matched with the theory put forth by him?
1. Mendel - Theory of Pangenesis
2. Weismann - Theory of continuity of germplasm
3. Pasteur - Inheritance of acquired characters
4. De Vries - Natural selection
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