Distinguish between respiration and combustion

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Solution

Respiration Combustion
Respiration is the process of oxidation of food material. Combustion is the process of burning of sugar to form carbon dioxide and water.
It does not require any external heat. External heat is required to burn the sugar.
Energy is released in several stages throughout the process. Energy is released only once.
The energy released is in the form of ATP. The energy released is in the form of heat.

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Respiration	Combustion
Respiration is the process of oxidation of food material.	Combustion is the process of burning of sugar to form carbon dioxide and water.
It does not require any external heat.	External heat is required to burn the sugar.
Energy is released in several stages throughout the process.	Energy is released only once.
The energy released is in the form of ATP.	The energy released is in the form of heat.