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Q. No.Evolutionary biology
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is the subfield of biology that studies the evolutionary processes (natural selection, common descent, speciation) that produced the diversity of life on Earth. |
| II: | is also defined as the study of the history of life forms on Earth. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Origin of Life | A BRIEF ACCOUNT OF EVOLUTION |
91%
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | When we look at stars on a clear night sky we are, in a way, looking back in time. |
| Reason (R): | When we see objects in our immediate surroundings we see them instantly and hence in the present time. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Origin of Life |
77%
From NCERT
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In the solar system of the milky-way galaxy, the earth was supposed to have been formed about:
| 1. | 20 billion years back | 2. | 10 billion years back |
| 3. | 4.5 billion years back | 4. | 3.0 billion years back |
Subtopic: Origin of Life |
82%
From NCERT
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Given the following statements about activities in the early earth:
Select the correct statements:
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. All are correct
| I: | Water vapour, methane, carbon dioxide, and ammonia released from molten mass covered the surface. |
| II: | The UV rays from the sun broke up water into Hydrogen and Oxygen and the lighter H2 escaped. |
| III: | Oxygen combined with ammonia and methane to form water, CO2, and other gases. |
| IV: | As it cooled, the water vapour fell as rain, filling all the depressions and forming oceans. |
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. All are correct
Subtopic: Origin of Life |
82%
From NCERT
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Which theory, regarding the origin of life, is alternatively also called “panspermia”?
| 1. | Special Creation | 2. | Spontaneous Generation |
| 3. | Cosmozoan Theory | 4. | Biochemical Evolution |
Subtopic: Other Theories of Origin of Life |
67%
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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 |
63%
From NCERT
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The figure shows an experiment that demonstrated that life comes only from pre-existing life. This experiment was conducted by:
1. Spallanzani
2. Francesco Redi
3. Louis Pasteur
4. van Helmont
1. Spallanzani
2. Francesco Redi
3. Louis Pasteur
4. van Helmont
Subtopic: Origin of Life |
95%
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Oparin of Russia and Haldane of England proposed that:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The first form of life could have come from pre-existing non-living organic molecules (e.g. RNA, protein, etc.) |
| II: | The formation of life was preceded by chemical evolution, i.e., the formation of diverse organic molecules from inorganic constituents. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Origin of Life |
89%
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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 |
76%
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In 1953, S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for the origin of the first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include:
| 1. | low temperature, volcanic storms, an 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: Urey & Miller Experiment |
89%
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