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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
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If the diploid number of a flowering plant is 36.what would be the chromosome
- Plants, but not animals, can convert fatty acids to sugars by a series
- Even in absence of pollinating agents seed setting is assured in
- Color blindness in which all the colours are perceived as grey is termed as
- Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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