(pictures are get from Google.com)
The point of cellular respiration is to harvest electrons from organic compounds such as glucose and use that energy to make a molecule called ATP. ATP in turn is used to provide energy for most of the immediate work that the cell does. ATP can be thought of as being like a small package of energy that has just the right amount of energy that can be used in a controlled manner.
Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things.
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