Answer:
When the energy is passed on from one trophic level to another, only 10 percent of the energy is passed on to the next trophic level.
Explanation:
 
        
             
        
        
        
Solution :
A cell that is concentrated is constructed by the same half reaction for the anode as well as he cathode. 
We know,
In a standard cell, 
the reduction half cell reaction is :

The oxidation half ell reaction :

Thus the complete reaction of the cell is :

 cell = 
 
        
             
        
        
        
Friction. It transforms other forms of energy into thermal energy
        
             
        
        
        
Reactant at the left product at the rig