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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.
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ultraviolet radiations from sunlight causes a reaction that produces
- A plant expressing a gene from another organism is
- The deficiencies of micronutrients not only affects the growth of the plants
- The most abundant naturally occurring plant hormone is
- What causes a green plant exposed to the light on only one side, to bend toward
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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