About the geologic time scale divisions
The geologic history of the Earth is broken up into hierarchical chunks of time. From largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages. 
        
                    
             
        
        
        
The Pentagon is the headquarters of the <span>United States Department of Defense
And is a symbol of the US military </span>
        
                    
             
        
        
        
    Phosphorylation refers to an addition of a phosphate group to a molecule.