Answer:
To make ATP
Explanation:
It is the main because it occurs in both aerobic ( presence of oxygen ) and anaerobic respiration ( absence of oxygen ).
 
        
                    
             
        
        
        
Answer:
well were not running out but not every place has clean water and no we never run out of clean water. theres always clean water
Explanation:
 
        
                    
             
        
        
        
The accumulation of several mutations in the main gene on the virus's surface may be able to give H7N9 the ability to spread like human flu viruses do, passing from person to person through coughing and sneezing.