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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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- Microsporogenesis is the
- Isolated metabolic reaction outside the body of an organism performed in test tube is
- Species occurring in different geographical areas are called as
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which disease is caused by virus
- Microsporogenesis is the
- Isolated metabolic reaction outside the body of an organism performed in test tube is
- Species occurring in different geographical areas are called as
- Osteomalacia occurs due to the deficiency of
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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