- 1(current)
Q. No.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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Industrial melanism is an example of:
| 1. | Natural selection | 2. | Mutation |
| 3. | Racial difference | 4. | Predation |
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Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype
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Match each item in Column I with one item in Column II and chose your answer from the codes given below.
|
Column I |
Column II |
|
I. Homologous organs II. Analogous organs III. Vestigeal organs |
1. Eye of an octopus and the eye of a mammal 2. Thorn of Bougainvillea and tendril of Cucurbita 3. Body hair and wisdom teeth in humans |
Codes:
| I | II | III | |
| 1. | 1 | 2 | 3 |
| 2. | 3 | 1 | 2 |
| 3. | 2 | 1 | 3 |
| 4. | 1 | 3 | 2 |
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For natural selection to bring about evolution, the trait selected by the nature must be:
| 1. | Dominant | 2. | Recessive |
| 3. | Mutant | 4. | Inherited |
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Reason: The unit of natural selection is individual
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
| 1. | they all are top predators in a food chain |
| 2. | they are all herbivores and hence get to feed on large amounts of available primary production |
| 3. | of lack of competition from any other mammals |
| 4. | the Australian environment is not conducive for the survival of true placental mammals |
| 1. | Homology | 2. | Analogy |
| 3. | Phenotypic plasticity | 4. | Vestigeality |
| COLUMN I | COLUMN II | ||
| (a) | Adaptive radiation | (i) | Fast emergence of resistance in bacteria against antibiotics |
| (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) | Dispersion and diversification of Australian marsupials |
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) |
- 1(current)
Q. No.
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