Blue-green algae aka Cyanobacteria
        
                    
             
        
        
        
Most enzymes do in fact work on a single substrate in most cases, this is because of the enzyme - substrate specificity. Certain reactant molecules acting as substrates can only fit in the "lock" of particular enzymes and undergo a conformational change and result in Unique products to be released after the reaction has occurred.
        
             
        
        
        
the answer is c because that is the answer im sure and by the way your welcome 
 
        
                    
             
        
        
        
Answer:
The ocean.
Explanation:
It starts with the ocean and then there is evaporation condensation and precipitation and then runoff.
 
        
             
        
        
        
To rest ourselves and prepare our mental and physical structure for the nezt day .