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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
- Which one of the following is correctly matched plant nutrients?
- Cornea is covered externally by a thin transparent membrane which is
- During blood clotting, the platelets release
- Peroxisomes are found in
- An example of a seed with endosperm, perisperm, and caruncle is
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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