Mechanical is. the digestion that occurs
        
             
        
        
        
The would have to be weather
        
             
        
        
        
<span>C6H12O6 + 6O2 ==> 6CO2 + 6H2O
</span><span> This chemical reactions proves the fact that the products of photosynthesis are reactants of respiration
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Answer;
-NAD+ 
Explanation;
-When glucose breaks down into ATP, a large amount of the energy is stored as electron on special molecules (the electron carriers). When an empty electron carrier accepts a pair of electrons, it is reduced; when it gives those electrons up later on, it is oxidized. 
-NAD+ and FAD; also the two most common electron carriers in the body. NAD+ can accept a pair of electrons (and a hydrogen ion) to become NADH.