Q. No.Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:
1. Convergent evolution 2. Divergent evolution 3. Saltatory evolution 4. Adaptive radiation
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What is genetic equilibrium?
1. When all the alleles of a gene are present in a population in equal frequencies
2. When the number of heterozygotes in a population is equal to the number of either of the homozygote.
3. When the number of heterozygotes in a population is equal to the number of either of the homozygote.
4. When the frequency of particular genes or alleles remains constant in a population through generations
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All the following are examples of analogous organs except:
| 1. | Thorn and tendrils of Bougainvillea and Cucurbita |
| 2. | Sweet potato and Potato |
| 3. | Flippers of Penguins and Dolphins |
| 4. | Eye of the Octopus and of Mammals |
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Genetic drift is :
1. random changes in gene frequency in a population
2. generational fluctuations in gene frequencies that produce no effect
3. changes due to interbreeding with other species populations
4. the effect of mutations as they spread through neighbouring populations
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Which one of the following would cause the Hardy-Weinberg principle to be inaccurate?
1. The size of the population is very large.
2. Individuals mate with one another at random.
3. Natural selection is present.
4. There is no source of new copies of alleles from outside the population.
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The theory of spontaneous generation stated that:
1. life arose from living forms only
2. life can arise from both living and non-living
3. life can arise from non-living things only
4. life arises spontaneously, neither from the living nor from the non-living
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Palaeontological evidence for evolution refers to the:
| 1. | development of the embryo | 2. | homologous organs |
| 3. | fossils | 4. | analogous organs |
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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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Fossils are generally found in:
| 1. | Sedimentary rocks | 2. | Igneous rocks |
| 3. | Metamorphic rocks | 4. | Any type of rock |
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Which type of selection explains industrial melanism observed in moth, Biston betularia?
| 1. | Stabilising | 2. | Directional |
| 3. | Disruptive | 4. | Artificial |
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