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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: - Acid rain is due to the pollution by
- The pigment responsible for photomorphogenetic response is
- The Golgicomplex plays a major role
- Concentration of the urine is controlled by
- Fight- or- flight reaction cause activation of:
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Acid rain is due to the pollution by
- The pigment responsible for photomorphogenetic response is
- The Golgicomplex plays a major role
- Concentration of the urine is controlled by
- Fight- or- flight reaction cause activation of:
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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