Q. No.The number of individuals expressing the dominant phenotype in a population of 200 is 182. What is the frequency of the dominant allele in this population?
1. 9 % 2. 30 % 3. 91 % 4. 70 %
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A mutation appears in a sub-population of organisms separated from the other group by in the same large geographical area. This mutation can spread to the other subgroup by:
1. induced muations
2. mutations in the gene pool of the other subgroup
3. mutation pressures
4. crossovers
Though we cannot be certain, what can be the probable reason/s for the sudden disappearance of dinosaurs from the Earth?
| I: | Climatic changes killed them |
| II: | Most of them evolved into birds |
| 1. | I only | 2. | II only |
| 3. | Both I and II | 4. | Neither I nor II |
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Which of the following pairs of organs do not represent analogous organs?
| 1. | Eye of an octopus and the eye of a mammal |
| 2. | Flippers of penguins and flippers of dolphin |
| 3. | Wings of bats and forelimbs of humans |
| 4. | Wings of birds and wings of butterfly |
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Darwin got the idea of ‘common descent with modification’ as evolution initially from his observations on:
1. geographic distribution of species
2. fossil records
3. comparative embryology
4. comparative biochemistry
Dinosaurs became extinct during the geological period:
1. Carboniferous
2. Jurassic
3. Cretaceous
4. Tertiary
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Plica semilunaris on the inside corner of the eye and, muscles in the pinna are:
| 1. | analogous structures | 2. | homologous structures |
| 3. | vestigial structures | 4. | phylogenetic structures |
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During which period of the geological time scale did the first seed plants evolve?
1. Carboniferous
2. Triassic
3. Jurassic
4. Cretaceous
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