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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: - Which of the following is polymerized to form proteins
- Which of the following surrounds the vacuole?
- Heparin is secreted by
- The details of tricarboxylic acid path was worked out by
- Semi-conservative replication of DNA was first demonstrated in:
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is polymerized to form proteins
- Which of the following surrounds the vacuole?
- Heparin is secreted by
- The details of tricarboxylic acid path was worked out by
- Semi-conservative replication of DNA was first demonstrated in:
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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