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Q. No.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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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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Consider the given two statements:
| Assertion (A): | A change of frequency of alleles in a population would be interpreted as resulting in evolution. |
| Reason (R): | Five factors are known to affect Hardy-Weinberg equilibrium. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Hardy Weinberg Law | Sources of Variation |
82%
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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Panspermia theory suggests that:
| 1. | Life originated independently at multiple locations on Earth. |
| 2. | Life on Earth was seeded by meteorites and comets. |
| 3. | Life evolved from simple to complex forms solely through natural selection. |
| 4. | Life exists only on Earth, and all life forms have a common origin. |
Subtopic: Other Theories of Origin of Life | Origin of Life |
84%
From NCERT
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The key difference between Homo habilis and Homo erectus is:
| 1. | Homo habilis used tools made of stone, while Homo erectus did not use any tools. |
| 2. | Homo erectus had a cranial capacity of 900 cc, unlike Homo habilis who had a cranial capacity of about 650 to 800 cc. |
| 3. | Homo habilis was capable of language, whereas Homo erectus was not. |
| 4. | Homo erectus lived in larger social groups compared to Homo habilis. |
Subtopic: Introduction to Human Evolution | Evolution of Homo Sapiens | Evolution Prior to Ape Man |
91%
From NCERT
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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
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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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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