Q. No.Two mya, Australopithecines probably lived in:
1. Western Africa
2. Eastern African grasslands
3. South America
4. South East Asia
1. Western Africa
2. Eastern African grasslands
3. South America
4. South East Asia
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Which of the following will not counter natural selection?
1. genetic drift
2. gene flow
3. mutation
4. Unlimited resources
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For differential success in reproduction, all the following must be present except:
| 1. | Gene flow between populations. |
| 2. | Variations must be genetically inherited. |
| 3. | Certain variations allow an individual to produce more offspring that survive in the next generation. |
| 4. | There must be variations in the phenotypes of individuals. |
Identify the correct statement:
| 1. | As the coacervates do not have lipid outer membranes and cannot reproduce, they alone could not have been the precursors of life. |
| 2. | The microspheres could not be induced to constrict but had a large amount of diversity. |
| 3. | The earliest life was probably not driven by solar energy as is seen today. |
| 4. | Protobionts cannot separate a combination of molecules from the surroundings or maintain an internal environment, but are able to reproduce. |
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Which of the following statements is incorrect regarding an evolutionary trend?
| 1. | It is the continuous change of a character within an evolving lineage. |
| 2. | The number of trends in any lineage is the same as the number of characters evolving. |
| 3. | A trend may be progressive or retrogressive. |
| 4. | Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations. |
Which of the following is not a major evolutionary trend seen in the evolution of horses?
| 1. | Progressive increase in the number of toes |
| 2. | Increase in the complexity of the molar teeth |
| 3. | Lengthening of the limbs in general |
| 4. | Enlargement of the brain |
The “Biogenetic Law” was given by :
| 1. | von Baer | 2. | Ernst Haeckel |
| 3. | Hugo de Vries | 4. | Theodosius Dobzhansky |
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Which of the following is not a proposition of Lamarckism?
| 1. | Living organisms or their component parts tend continually to increase in size |
| 2. | Production of new organs results from a new need due to a change in the environment |
| 3. | If an organ is used constantly, it tends to get developed, whereas disuse results in degeneration |
| 4. | Modifications produced by the above mechanisms during the lifetime of an individual will not be inherited |
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Around 200 mya, some land reptiles went back to the water to evolve into fish-like reptiles, for example:
| 1. | Pareiasaurus | 2. | Pelycosaurus |
| 3. | Ichthyosaurs | 4. | Archosaurus |
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