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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: - Toxic agents present in food which interfere with thyroxine synthesis lead
- Which one of the following generally acts as an antagonist to gibberellins?
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Toxic agents present in food which interfere with thyroxine synthesis lead
- Which one of the following generally acts as an antagonist to gibberellins?
- Active transport of ions by the cell requires
- Water movement between cells is due to
- Sympathetic nervous system induces
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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