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Q. No.In evolutionary terms, variations due to mutations are:
1. random and directionless
2. random and directional
3. small and directional
4. random, small and directional
Subtopic: Hugo De Vries Theory of Evolution | Mechanism of Evolution |
78%
From NCERT
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Consider the given two statements:
| Assertion (A): | Those who are better fit in an environment, leave more progeny than others. |
| Reason(R): | The fitness, according to Darwin, refers ultimately and only to reproductive 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, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Darwin's Theory |
79%
From NCERT
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What, according to Lamarck, is the reason for the especially long neck seen in giraffes?
| 1. | Ancestral giraffes with longer necks got more food and left more surviving offspring. |
| 2. | Ancestral giraffes stretched their necks to get food. |
| 3. | It was a divine creation. |
| 4. | The giraffe is the mammal where the number of cervical vertebrae is much more than the number of cervical vertebrae in other mammals. |
Subtopic: Theory of Evolution & Lamarckism | Biological Evolution |
82%
From NCERT
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Natural selection acts only on the traits that are:
1. Dominant
2. Recessive
3. Acquired during the lifetime of an individual
4. Inherited
1. Dominant
2. Recessive
3. Acquired during the lifetime of an individual
4. Inherited
Subtopic: Biological Evolution |
57%
From NCERT
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What conditions of the primeval earth, as proposed by Oparin, were simulated in his experiment by S. L. Miller in 1953?
| 1. | low temperature, volcanic storms, atmosphere rich in oxygen |
| 2. | low temperature, volcanic storms, reducing atmosphere |
| 3. | high temperature, volcanic storms, non-reducing atmosphere |
| 4. | high temperature, volcanic storms, reducing atmosphere containing CH4, NH3 etc. |
Subtopic: Origin of Life |
92%
From NCERT
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Identify the correct lineage in human evolution
| 1. | Australopithecus → Ramapithecus → Homo sapiens → Homo habilis |
| 2. | Homo erectus → Homo habilis → Homo sapiens |
| 3. | Ramapithecus → Homo habilis → Homo erectus → Homo sapiens |
| 4. | Australopithecus → Ramapithecus → Homo erectus → Homo habilis → Homo sapiens. |
Subtopic: Evolution of Homo Sapiens |
81%
From NCERT
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Evolution of life shows that life forms had a trend of moving from:
1. land to water
2. dry land to wet land
3. fresh water to sea water
4. water to land
1. land to water
2. dry land to wet land
3. fresh water to sea water
4. water to land
Subtopic: Origin of Life | A BRIEF ACCOUNT OF EVOLUTION |
94%
From NCERT
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The emergence of resistance to antibiotics in bacterial groups is due to:
1. adaptive radiation
2. transduction
3. pre-existing variation in the population
4. mutations induced by antibiotics
1. adaptive radiation
2. transduction
3. pre-existing variation in the population
4. mutations induced by antibiotics
Subtopic: Concept of Organic Evolution: Evidence |
From NCERT
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The process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits is:
1. reverse evolution
2. artificial selection
3. mutation
4. natural selection
1. reverse evolution
2. artificial selection
3. mutation
4. natural selection
Subtopic: Concept of Organic Evolution: Evidence |
91%
From NCERT
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Consider the two statements:
| Assertion (A): | Classification of organisms into related groups should not solely be based on the morphological features. |
| Reason (R): | Convergent evolution results in unrelated organisms resembling each other. |
| 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, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
61%
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