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Earth originated approximately
Options
(a) 4,500 million years ago
(b) 3,600 million years ago
(c) between 1,600 – 2,600 million years ago
(d) 2.5 million years ago
Correct Answer:
4,500 million years ago
Explanation:
The earth is believed to be originated about 4,500 million years ago (in precambrian Era). Earlier earth’s surface was too hot (about 1000⁰ C). At this temperature life was not possible and water molecules existed in vapour form. It took a long time to cool down the earth. About 3500 million years ago the earth surface become cool enough to hold water and the large water bodies or first ocean came into existence. It marked the beginning of first life on the earth. Water is most essential factor for origin of life.
Related Questions: - Ciliates differ from all other protozoans in
- The maintenance of internal favourable conditions by a self regulated mechanism
- Hypothalamus does not control
- Photochemical combination of hydrocarbons and nitrogen oxides emitted by automobile
- If 20 J of energy is trapped at producer level, then how much energy will be available
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ciliates differ from all other protozoans in
- The maintenance of internal favourable conditions by a self regulated mechanism
- Hypothalamus does not control
- Photochemical combination of hydrocarbons and nitrogen oxides emitted by automobile
- If 20 J of energy is trapped at producer level, then how much energy will be available
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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