Oxygen is returned to the atmosphere mainly by:

  • A
    Photosynthesis
  • B
    Respiration
  • C
    Burning of fossil fuel
  • D
    Fungi

Explore More

Similar Questions

What causes acid rain? Mention any damage caused by it on living organisms.

$(a)$ How is soil pollution caused?
$(b)$ Write three ways to prevent soil pollution.

Fertile soil has lots of humus. Why?

Mention the three processes in which oxygen is used up from the atmosphere and the only process in which it is returned to the atmosphere.

What happens when rain falls on soil without vegetational cover?

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