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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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Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The most abundant prokaryotes helpful to humans in making curd from milk
- In Minamata Bay Japan, the animals which remained free from Minamata disease, are
- Process in which fertilization occurs without fusion of gametes
- Citric acid cycle is also called
- Storage of enzymes for the digestion of cellular components proteins and carbohydrates
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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