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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: - AIDS is due to
- Pacemaker is
- Atherosclerosis refers to the ailment of
- Which of the following is not a product of light reaction of photosynthesis?
- In the overall process of photosynthesis the number of CO water sugar and
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- AIDS is due to
- Pacemaker is
- Atherosclerosis refers to the ailment of
- Which of the following is not a product of light reaction of photosynthesis?
- In the overall process of photosynthesis the number of CO water sugar and
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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