Oxygen and glucose are need for cellular respiration
        
                    
             
        
        
        
Answer:
DNA helicase
Explanation:
DNA helicase belongs to the class of biological molecules known as enzymes, which are biological catalysts. hope that helps love!
 
        
             
        
        
        
Answer:
17%. They create 21% of the oxygen 
Explanation:
Just used the search engine 
 
        
             
        
        
        
Water is a Solute so your answer is C. have a nice day
        
             
        
        
        
Cause living things can not directly use most of matter which they found in nature. For example carbon, all organism use carbon in complex structure, that is in compound or macromolecule(glucose,fructose,amino acid). we can not directly earn ATP from C which we found in soil/other sources.