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Q. No.Who demonstrated through careful experimentation that life arises only from pre-existing life, thereby dismissing the theory of spontaneous generation?
1. Anton van Leeuwenhoek
2. Robert Koch
3. Louis Pasteur
4. Alexander Fleming
1. Anton van Leeuwenhoek
2. Robert Koch
3. Louis Pasteur
4. Alexander Fleming
Subtopic: Origin of Life |
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Level 1: 80%+
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Which gases were primarily present in the atmosphere of early Earth [according to Alexander I. Oparin] before the formation of the ozone layer?
| 1. | Oxygen, Nitrogen, and Argon |
| 2. | Water vapor, Methane, Hydrogen, and Ammonia |
| 3. | Nitrogen, Helium, and Hydrogen |
| 4. | Hydrogen, Oxygen, Nitrogen, and Ozone |
Subtopic: Origin of Life |
92%
Level 1: 80%+
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The concept of chemical evolution is based on:
| 1. | crystallization of chemicals |
| 2. | interaction of water, air, and clay under intense heat |
| 3. | effect of solar radiation on chemicals |
| 4. | possible origin of life by a combination of chemicals under suitable environmental conditions |
Subtopic: Origin of Life: Chemical Evolution: 1 | Origin of Life: Chemical Evolution: 2 | Origin of Life |
89%
Level 1: 80%+
AIPMT - 2007
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Which gas was absent in free form in any significant amounts in the primeval Earth's atmosphere at the time of the origin of life?
| 1. | Methane | 2. | Ammonia |
| 3. | Oxygen | 4. | Hydrogen |
Subtopic: Origin of Life |
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Louis Pasteur’s experiment played a key role in disproving the theory of spontaneous generation. What was the key observation in his experiment?
| 1. | Life originated in sterilized flasks containing dead yeast. |
| 2. | No new life appeared in pre-sterilized flasks, while new organisms appeared in flasks open to air. |
| 3. | New living organisms arose from killed yeast even in pre-sterilized, sealed flasks. |
| 4. | Life was seen in both open and closed flasks, proving spontaneous generation. |
Subtopic: Origin of Life |
85%
Level 1: 80%+
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Which of the following conditions was not there in the Earth at the time of origin of first life form?
| 1. | High Temperature |
| 2. | Volcanic storms |
| 3. | Reducing atmosphere |
| 4. | Oxygen,Methane and Ammonia in the environment |
Subtopic: Origin of Life: Chemical Evolution: 1 | Origin of Life |
84%
Level 1: 80%+
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The Big Bang theory proposes the origin of the universe, but which of the following accurately describes the sequence of events that led to the formation of the first galaxies?
| 1. | A huge explosion, expansion, formation of Hydrogen and Helium, condensation under gravity, formation of galaxies. |
| 2. | Formation of stars, cooling of matter, creation of gases, and formation of planets. |
| 3. | A singular explosion, formation of water and carbon dioxide, development of galaxies, and creation of life on Earth. |
| 4. | Explosion of stars leading to cooling, condensation of gases, and formation of planets. |
Subtopic: Origin of Life |
83%
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Which of the following represents the correct sequence of events in the origin of Earth and life according to the textbook?
| 1. | Formation of Earth → Cooling of Earth → Formation of Oceans → Emergence of Life |
| 2. | Cooling of Earth → Formation of Atmosphere → Creation of Stars → Emergence of Life |
| 3. | Formation of Earth → Creation of DNA → Formation of Life → Formation of Oceans |
| 4. | Formation of Earth → Emergence of Life → Formation of Atmosphere → Creation of DNA |
Subtopic: Origin of Life |
83%
Level 1: 80%+
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Read the following statements and choose the correct option
| Statement A: | Formation of life was preceded by chemical evolution |
| Statement B: | First forms of life could have come from pre-existing non-living organic molecules |
| 1. | Only statement A is incorrect |
| 2. | Only statement B is incorrect |
| 3. | Both A and B statements are incorrect |
| 4. | Both A and B statements are correct |
Subtopic: Origin of Life |
82%
Level 1: 80%+
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About how long ago was the earth formed?
1. 3 billion years ago
2. 10 billion years ago
3. 4.6 billion years ago
4. 20 billion years ago
1. 3 billion years ago
2. 10 billion years ago
3. 4.6 billion years ago
4. 20 billion years ago
Subtopic: Origin of Life |
81%
Level 1: 80%+
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