The number of biochemical reactions in the body is extremely great.
Metabolism
The entire cell and extra cellular matrix is subject to thousands of chemical reactions every second. These chemical reactions produce all of our energy, or movements, thoughts EVERYTHING that occurs in the body.
Fertilized eggs undergo a great many chemical reactions as they develop into chickens. Unfertilized eggs don't undergo chemical reactions until such time as they are either cooked and eaten, or go bad and are thrown away.
Yes, reversible chemical reactions exist.
Chemical reactions helps life to go on,in that it helps the process of metabolism within cells of living things.
After chemical reactions new substances are obtained.
No, when body temperature drops below normal the body will slow down in its functions and go into "preservation mode".
The mitochondria
Decomposition involves chemical reactions and as a rough approximation, for many chemical reactions happening at around room temperature, the rate of reaction doubles for every 10°C rise in temperature. The reason for this is that for chemical reactions to happen, at the smallest scale, the individual chemical molecules have to bump into one another. As molecules warm up they begin to vibrate more and the chances of them bumping in to one another increases - the more bumps that happen, the faster the reactions go.
Atomic, and subatomic particles go to different atomic, and subatomic particles.
there are various chemical and physical reactions that go on in the geosphere that is caused by the atmosphere.
increasing concentrationincreasing temperaturesometimes increasing pressureadding a catalyst