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Q. No. “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 |
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Consider the given two statements:
Assertion: Natural selection can be regarded as ‘differential reproduction’.
Reason: Nature selects for fitness.
Assertion: Natural selection can be regarded as ‘differential reproduction’.
Reason: Nature selects for fitness.
| 1. | Both Assertion and Reason are true and Reason correctly explains the Assertion. |
| 2. | Both Assertion and Reason are true but Reason does not correctly explain the Assertion. |
| 3. | Assertion is true but Reason is false. |
| 4. | Assertion is false but Reason is true. |
Subtopic: Natural Selection |
From NCERT
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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%
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Evolution by anthropogenic action:
1. is a determinist process.
2. only leads to evolution of species that are useful to humans.
3. usually is faster than the natural process.
4. is not at all related to mutations
1. is a determinist process.
2. only leads to evolution of species that are useful to humans.
3. usually is faster than the natural process.
4. is not at all related to mutations
Subtopic: Palentological Evidences of Evolution |
61%
From NCERT
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Consider the given two statements
| Assertion: | Dark melanic peppered moth survive better in polluted environments. |
| Reason: | In polluted areas, dark melanic moths are able to camouflage themselves. |
| 1. | Both Assertion and Reason are true and Reason correctly explains the Assertion. |
| 2. | Both Assertion and Reason are true but Reason does not correctly explain the Assertion. |
| 3. | Assertion is true but Reason is false. |
| 4. | Assertion is false but Reason is true. |
Subtopic: Palentological Evidences of Evolution |
94%
From NCERT
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Consider the given two statements:
| Assertion(A): | Homology implies divergent evolution. |
| Reason(R): | Homologous organs are organs which do similar jobs in two taxa that were not present in their most recent common ancestor but rather evolved separately. |
| 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: Palentological Evidences of Evolution |
79%
From NCERT
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Embryological support for evolution, proposed by Ernst Heckel, was disapproved by:
1. Charles Lyell
2. Georges Cuvier
3. Charles Darwin
4. von Baer
1. Charles Lyell
2. Georges Cuvier
3. Charles Darwin
4. von Baer
Subtopic: Concept of Organic Evolution: Evidence: 3 |
93%
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Consider the given two statements:
| Assertion (A): | Only a small percentage of life-forms can be expected to be represented in fossil discoveries. |
| Reason (R): | Organisms are only rarely preserved as fossils in the best of circumstances, and only a fraction of such fossils have been discovered. |
| 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: Palentological Evidences of Evolution |
81%
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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 |
79%
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Regarding Miller and Urey experiment:
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: | They created similar conditions in a laboratory scale as was proposed for primeval Earth atmosphere by Oparin. |
| II: | They created electric discharge in a closed flask containing CH4, O2, NH3 and water vapour at 80°C. |
| III: | They observed formation of amino acids. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Urey & Miller Experiment |
86%
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