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Question

Which of the following is the main source of free oxygen?
  1. Respiration
  2. All of the above
  3. Conduction
  4. Photosynthesis

A
All of the above
B
Respiration
C
Conduction
D
Photosynthesis
Solution
Verified by Toppr

The correct option is C Photosynthesis
  • In plants, during the process of photosynthesis, starch and free oxygen are produced from carbon dioxide and water in the presence of sunlight.
6CO2+6H2O+energy C6H12O6+6O2
  • During respiration, the plants use free oxygen molecules to produce water, carbon dioxide, and energy, required for plants to grow.
  • Conduction is the transfer of heat through matter.
  • So, the correct answer is option C.

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