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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: - End product of glycolysis is
- Which one of the following animals is correctly matched with taxonomic category
- Removal of hydrogen and CO₂ from a substrate is called
- A small aquatic herb in which a portion of leaf forms a tiny sac or bladder
- PSI and PSII was discovered by
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- End product of glycolysis is
- Which one of the following animals is correctly matched with taxonomic category
- Removal of hydrogen and CO₂ from a substrate is called
- A small aquatic herb in which a portion of leaf forms a tiny sac or bladder
- PSI and PSII was discovered by
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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