| ⇦ | 
| ⇨ |
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: - An artificial pacemaker is implanted subcutaneously and connected to the heart
- Which one of the following have the highest number of species in nature?
- Mosses and ferns are found in moist and shady places because both
- Biolistic technique is used in
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An artificial pacemaker is implanted subcutaneously and connected to the heart
- Which one of the following have the highest number of species in nature?
- Mosses and ferns are found in moist and shady places because both
- Biolistic technique is used in
- Chloride shift occurs in respond to
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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