Q. No.Change in the frequency of an allele in a population due to random sampling of organisms brought about by a chance event is called:
1. Gene flow
2. Genetic drift
3. Natural selection
4. Saltation
1. Gene flow
2. Genetic drift
3. Natural selection
4. Saltation
The factor that leads to Founder effect in a population is:
1. Mutation
2. Genetic drift
3. Natural selection
4. Genetic recombination
Match List-I with List-II:
| List-I | List-II | ||
| (a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropogenic action | (iv) | Darwin Finches |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (i) | (iv) | (iii) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iii) | (ii) | (i) | (iv) |
A Hominid fossil discovered in Java in 1891, now extinct, having a cranial capacity of about 900 cc was:
| 1. | Homo erectus | 2. | Neanderthal man |
| 3. | Homo sapiens | 4. | Australopithecus |
The phenomenon of the evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
| 1. | Saltation | 2. | Co-evolution |
| 3. | Natural selection | 4. | Adaptive radiation |
After about how many years of the formation of the earth, life appeared on this planet?
1. 500 billion years
2. 50 million years
3. 500 million years
4. 50 billion years
Embryological support for evolution was proposed by:
| 1. | Ernst Heckel | 2. | Karl Ernst von Baer |
| 3. | Charles Darwin | 4. | Alfred Wallace |
1. Panspermia
2. Divine or special creation
3. Spontaneous generation
4. Primary abiogenesis
| 1. | Glycine | 2. | Alanine |
| 3. | Aspartic acid | 4. | Tryptophan |
1. Early earth had a chemically oxidising atmosphere.
2. This atmosphere, exposed to energy in various forms, produced simple organic compounds ("monomers").
3. These compounds accumulated in a "soup", which may have been concentrated at various locations (shorelines, oceanic vents etc.).
4. By further transformation, more complex organic polymers – and ultimately life – developed in the soup.
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