In the earliest days when life originated on earth, the atmosphere contained ________
A. Free oxygen
B. No oxygen
C. Oxygen in fixed form
D. Oxygen bound to carbon
Answer: Option D
Related Questions on Earth
The earth is at the largest distance from the sun (Apehelion) on ________
A. June 21st
B. January 3rd
C. July 4th
D. September 23rd
The seasonal contrasts are maximum in ________
A. Low latitudes
B. Mid-latitudes
C. Sub tropics
D. High latitudes
A radio broadcast from Delhi on Monday at 7.30 p.m. is heard at New York on ________
A. Tuesday at 8.35 PM
B. The same day at 7.30 PM
C. The same day at 7:30 AM
D. The same day at 10:00AM
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