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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.
Related Questions: - Widal Test is carried out to test
- Which pair of the following belongs to Basidiomycetes
- Thylakoids in chloroplasts are
- Quercus species are the dominant component in
- The organism, used for alcoholic fermentation, is
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Widal Test is carried out to test
- Which pair of the following belongs to Basidiomycetes
- Thylakoids in chloroplasts are
- Quercus species are the dominant component in
- The organism, used for alcoholic fermentation, is
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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