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Q. No.Within the Australian continent marsupials have undergone:
| 1. | disruptive selection |
| 2. | adaptive radiation |
| 3. | extinction |
| 4. | rapid speciation due to sudden large scale mutations |
Subtopic: Genetic Basis of Adaptation |
94%
Level 1: 80%+
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“Giraffes, in an attempt to forage leaves on tall trees, had to adapt by elongation of their necks and they passed on this acquired character of elongated neck to succeeding generations” – this explanation of long necks can best be ascribed to:
| 1. | Charles Darwin | 2. | Lamarck |
| 3. | Hugo de Vries | 4. | Louis Pasteur |
Subtopic: Theory of Evolution & Lamarckism |
93%
Level 1: 80%+
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Natural selection can lead to:
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: | stabilisation in which more individuals acquire mean character value |
| II: | directional change in which more individuals acquire value other than the mean character value |
| III: | disruption in which more individuals acquire peripheral character value at both ends of the distribution curve |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Natural Selection |
87%
Level 1: 80%+
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It is possible that Darwin was influenced by the essay on populations by:
| 1. | Carl Correns | 2. | Charles Lyell |
| 3. | Thomas Malthus | 4. | A. R. Wallace |
Subtopic: Modern Theory of Evolution |
84%
Level 1: 80%+
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The loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population is called as:
| 1. | Edge effect | 2. | Genetic bottleneck |
| 3. | Founder effect | 4. | Saltation |
Subtopic: Hardy Weinberg Law: 2 |
81%
Level 1: 80%+
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Hugo de Vries believed that:
| 1. | discontinuous variations due to mutations are important for evolution |
| 2. | continuous variations due to recombination are important for evolution |
| 3. | evolution is a function of time |
| 4. | evolution is a deterministic process |
Subtopic: Hugo De Vries Theory of Evolution |
78%
Level 2: 60%+
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In geological time scale, the correct sequence of periods [beginning with earliest] will be:
1.
Silurian → Devonian → Carboniferous → Permian
2.
Permian → Devonian → Carboniferous → Silurian
3.
Silurian → Carboniferous → Devonian → Permian
4.
Permian → Carboniferous → Devonian → Silurian
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
73%
Level 2: 60%+
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The frequency of the recessive allele for a trait is recorded to be 0.25 [Assume only two alleles for the gen and complete dominance]. What would the expected frequency of the heterozygotes in this population?
1. 0.0625
2. 0.5625
3. 0.375
4. 0.1875
1. 0.0625
2. 0.5625
3. 0.375
4. 0.1875
Subtopic: Hugo De Vries Theory of Evolution |
68%
Level 2: 60%+
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Consider the given two statements:
| Assertion (A): | Natural selection can be regarded as ‘differential reproduction’. |
| Reason (R): | Nature selects for fitness. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Natural Selection |
Level 4: Below 35%
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Consider the given two facts:
What inference(s) can be definitely drawn from the given facts?
A. there had been competition for resources
B. the best adapted survive the competition
| I: | Theoretically, population size will grow exponentially if everybody reproduced maximally |
| II: | Population sizes in reality are limited |
A. there had been competition for resources
B. the best adapted survive the competition
| 1. | Only A | 2. | Only B |
| 3. | Both A and B | 4. | Neither A nor B |
Subtopic: Population Genetics |
Level 4: Below 35%
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