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Q. No.What type of natural selection is shown in the given figure?
1. Stabilising
2. Directional
3. Disruptive
4. Reverse
Subtopic: Natural Selection |
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Consider the given two statements:
| Assertion (A): | Fossils are generally found in sedimentary rocks. |
| Reason (R): | For fossilization, the organism must become covered by sediment soon after death, otherwise the remains are destroyed by scavengers or decomposition. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and (R) correctly explains (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Palentological Evidences of Evolution |
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Level 3: 35%-60%
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The frequency of an allele in a population is ultimately decided by:
| 1. | Dominance |
| 2. | Whether it is autosomal linked or sex linked |
| 3. | Forces such as natural selection |
| 4. | The number of alleles present for a particular gene |
Subtopic: Natural Selection |
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Variations on which natural selection acts, arise as a result of random mutations. |
| Reason (R): | A new variation may, or may not, be adaptive. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | (A) is False and (R) is also False. |
| 4. | (A) is True but (R) is False. |
Subtopic: Darwin's Theory |
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Five factors are known to affect Hardy-Weinberg equilibrium. Which of the following is not one of them?
1. gene migration or gene flow
2. genetic drift
3. mutation
4. random mating
1. gene migration or gene flow
2. genetic drift
3. mutation
4. random mating
Subtopic: Hardy Weinberg Law: 2 |
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Disturbance in genetic equilibrium, or Hardy-Weinberg equilibrium, is interpreted as resulting in:
1. adaptive radiation
2. evolution
3. saltation
4. speciation
1. adaptive radiation
2. evolution
3. saltation
4. speciation
Subtopic: Hardy Weinberg Law: 2 |
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What will not be true regarding ‘industrial melanism’?
| 1. | Before industrialisation set in in England, it was observed that there were more white-winged moths on trees than dark-winged or melanised moths. |
| 2. | After industrialisation, there were more dark-winged moths in the same area. |
| 3. | In areas where industrialisation did not occur e.g. in rural areas, the count of melanic moths was low. |
| 4. | One of two variants got completely wiped out according to prevalent conditions and later arose through a recurring mutation. |
Subtopic: Theory of Evolution & Lamarckism |
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A study of fossils in different sedimentary layers:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | indicates the geological period in which they existed. |
| II: | shows that life-forms varied over time. |
| III: | shows that certain life-forms are restricted to certain geological time-spans. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Palentological Evidences of Evolution |
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The connotations of the special creation theory regarding the origin of life do not include:
| 1. | All living organisms (species or types) that we see today were created as such. |
| 2. | The diversity was always the same since creation and will be the same in future also. |
| 3. | Earth is about 4000 years old. |
| 4. | Living organisms develop from non-living matter. |
Subtopic: Origin of Life |
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How many of the given statements regarding gradual evolution of life forms as explained by Darwin are correct?
1. 1
2. 2
3. 3
4. 4
| I: | Any population has built in variation in characteristics. |
| II: | Those characteristics which enable some to survive better in natural conditions (climate, food, physical factors, etc.) would outbreed others that are less-endowed to survive under such natural conditions. |
| III: | The fitness, according to Darwin, refers ultimately and only to reproductive fitness. |
| IV: | Those who are better fit in an environment, leave more progeny than others. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Additional Theories of Darwin |
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