How was the oxygen in the atmosphere produced?

  • A
    Evaporation of water
  • B
    Photosynthesis by plants
  • C
    Metabolism of microorganisms
  • D
    Decay of organisms

Explore More

Similar Questions

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

Which of the following were present in the prebiotic soup?

The primitive or early atmosphere was composed of which mixture?

The presence of $NaCl$ in body fluids indicates that life originated in:

On primitive Earth,oxygen combined with $........$ to produce water and carbon dioxide.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo