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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: - Asynchronous contraction of heart muscle is termed as
- In diplospory, embryo developed from diploid
- Albuminous seeds store their reserve food mainly in
- Thermal cycle 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
- Asynchronous contraction of heart muscle is termed as
- In diplospory, embryo developed from diploid
- Albuminous seeds store their reserve food mainly in
- Thermal cycle is used in
- The loss of one single chromosome creates a condition called
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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