| ⇦ | 
| ⇨ |
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: - The first step of photosynthesis is
- Which one of the following statement is incorrect about menstruation?
- In some plants anthers and stamen grow and mature at same time. This phenomenon
- Which is near to the plasma membrane
- Cell elongation is adversely affected by Element required by plant in large
Topics: Evolution
(132)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The first step of photosynthesis is
- Which one of the following statement is incorrect about menstruation?
- In some plants anthers and stamen grow and mature at same time. This phenomenon
- Which is near to the plasma membrane
- Cell elongation is adversely affected by Element required by plant in large
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