- 1(current)
Q. No.According to the Darwinian concept of evolution, a giraffe has a long neck because:
| 1. | it was always like that since the beginning |
| 2. | during evolution the number of cervical vertebrae got increased |
| 3. | its ancestors stretched their necks to get food |
| 4. | ancestral giraffes with longer necks got more food and left more surviving offspring |
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A population geneticist finds that a new allele in a population has suddenly increased in frequency. Most likely this allele is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
The appearance of antibiotic-resistant bacteria is an example of:
1. adaptive radiation
2. transduction
3. pre-existing variation in the population
4. divergent evolution
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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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- 1(current)
Q. No.
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