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In the primitive atmosphere which was not available in free state?
Options
(a) CH₄
(b) H₂
(c) O₂
(d) H₂O
Correct Answer:
O₂
Explanation:
The early atmosphere was without free oxygen, so atmosphere was reducing in nature. It only contained hydrogen, methane, ammonia and water vapours. At present free oxygen is present so atmosphere is oxidising in nature.
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Topics: Evolution
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Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- How many chromosomes are there in endosperm cell of Zea mays?
- Somatic hybridization is a technique of
- A person is exclusively feeding on meat, egg and milk. He is likely to suffer from
- Engulfing of food either in solid or liquid form is called
- Epithellial cells of the intenstine involved in food absorption have on their
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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