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Question

Define respiration.
  1. Use oxygen and release energy
  2. Use carbon dioxide and give out oxygen
  3. Use of energy to give out oxygen
  4. All of above

A
Use oxygen and release energy
B
Use carbon dioxide and give out oxygen
C
Use of energy to give out oxygen
D
All of above
Solution
Verified by Toppr

Respiration is defined as the movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction. The oxygen from air oxidises food substances mainly glucose in their body cells and release energy in the form of heat.

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