| ⇦ | 
| ⇨ |
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: - One gene-one enzyme relationship was established for the first time in
- In a grassland ecosystem, if the number of primary producers is approximately 6
- Which of the following statements about Sporopollenin is correct?
- Which of the following blood vessels in circulatory system of frog has more deoxygenated blood?
- Which one of the following plasma proteins is involved in the coagulation of blood?
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- One gene-one enzyme relationship was established for the first time in
- In a grassland ecosystem, if the number of primary producers is approximately 6
- Which of the following statements about Sporopollenin is correct?
- Which of the following blood vessels in circulatory system of frog has more deoxygenated blood?
- Which one of the following plasma proteins is involved in the coagulation of blood?
Topics: Evolution (132)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply