<span>Compare:  both RNA and DNA have 3 nitrogenous bases: Adenine Cytosine and Guanine. Also b</span>oth have a phosphate groups in their nucleotides<span> 
Contrast: </span>RNA is a polymer with a ribose AND a phosphate backbone. It has four different nitrogenous bases: adenine, guanine, cytosine, and uracil.
DNA<span> is a long polymer with deoxyriboses AND phosphate backbone. It also has  four </span>different<span> nitrogenous bases: adenine, guanine, cytosine and thymine. 
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Hope this helps
        
             
        
        
        
Hihi!
A solvent is something that's able to dissolve other substances and things. Like acid!
I hope I helped!
-Jailbaitasmr
        
                    
             
        
        
        
Answer:
Where is the question photo
 
        
             
        
        
        
The epiglottis. It prevents food from entering the respiratory tract