Marine fish gills have cells that have the ability to can remove salt by pumping it into the salt water.
This is active transport in real life.
Hope this helps!
 
        
             
        
        
        
Answer:
Respiration is important because it converts food energy into chemical energy. 
Explanation:
 
        
             
        
        
        
1). it either lowers or increases the activation energy. 2). it modifies the rate of the reaction