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Q. No.For the stability of the organic compounds, Oparin opined that, probably:
1.
UV radiation never reached the surface of the primeval Earth
2.
the primeval Earth was in a molten state
3.
the primeval Earth atmosphere was reducing rather than oxidizing
4.
plenty of energy sources were available for chemical reactions to occur
Subtopic: Definition & Types of Evolution | Cosmic Evolution | Examples of Chemical Evolution |
77%
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What is genetic equilibrium?
| 1. | When all the alleles of a gene are present in a population in equal frequencies |
| 2. | When the number of heterozygotes in a population is equal to the number of either of the homozygote. |
| 3. | When the number of heterozygotes in a population is equal to the number of either of the homozygote. |
| 4. | When the frequency of particular genes or alleles remains constant in a population through generations |
Subtopic: Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
80%
From NCERT
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Gene flow is :
| 1. | the emergence of new species from pre-existing species |
| 2. | the exchange of genes during fertilization |
| 3. | mating between close relatives |
| 4. | the movement of genes between species populations |
Subtopic: Population Genetics | Genetic Basis of Adaptation | Hardy Weinberg Law |
From NCERT
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Genetic drift is :
| 1. | random changes in gene frequency in a population |
| 2. | generational fluctuations in gene frequencies that produce no effect |
| 3. | changes due to interbreeding with other species populations |
| 4. | the effect of mutations as they spread through neighbouring populations |
Subtopic: Hardy Weinberg Law |
85%
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Which one of the following would cause the Hardy-Weinberg principle to be inaccurate?
| 1. | The size of the population is very large. |
| 2. | Individuals mate with one another at random. |
| 3. | Natural selection is present. |
| 4. | There is no source of new copies of alleles from outside the population. |
Subtopic: Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
60%
From NCERT
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The theory of spontaneous generation stated that:
| 1. | life arose from living forms only |
| 2. | life can arise from both living and non-living |
| 3. | life can arise from non-living things only |
| 4. | life arises spontaneously, neither from the living nor from the non-living |
Subtopic: Other Theories of Origin of Life |
64%
From NCERT
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Palaeontological evidence for evolution refers to the:
| 1. | development of the embryo | 2. | homologous organs |
| 3. | fossils | 4. | analogous organs |
Subtopic: Palentological Evidences of Evolution |
92%
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Analogous organs arise due to:
| 1. | divergent evolution | 2. | artificial selection |
| 3. | genetic drift | 4. | convergent evolution |
Subtopic: Concept of Organic Evolution: Evidence |
90%
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Fossils are generally found in:
1. Sedimentary rocks
2. Igneous rocks
3. Metamorphic rocks
4. Any type of rock
1. Sedimentary rocks
2. Igneous rocks
3. Metamorphic rocks
4. Any type of rock
Subtopic: Palentological Evidences of Evolution |
92%
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For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group-bearing organisms is likely to be:
| 1. | 42% | 2. | 49% |
| 3. | 9% | 4. | 58% |
Subtopic: Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 |
82%
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