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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: - T.O. Diener discovered
- Pattern of cleavage in frog’s egg is
- Which of the following is the largest gland in an adult man?
- In nodulous plant leghaemoglobin helps in
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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- T.O. Diener discovered
- Pattern of cleavage in frog’s egg is
- Which of the following is the largest gland in an adult man?
- In nodulous plant leghaemoglobin helps in
- In contrast to annelids, the platyhelminthes show
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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