20.
They told me that my answer was too short so I'm just adding this on, don't mind me.                                    
        
             
        
        
        
Prokaryotic cells are simple, ancient cells without a nucleus. Eukaryotic cells are more complex and have a nucleus.
        
             
        
        
        
The way that   partially digested food leaves the body is through the pyloric sphincter.
<h3>What is digestion?</h3>
The term digestion has to do with the breaking down of complex food substances that is taken in by animals during nutrition. Food that is  digested will go out of the body in semisolid form.
Hence, way that partially digested food leaves the body is through the pyloric sphincter.
Learn more about digestion:brainly.com/question/1283194
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The difference between a dominant trait and a recessive trait is that the dominant trait must have one copy of each from two different parent 
Example: Brown Hair=H
Light hair=h
Hh is dominant because this is of a copy of each from two parents
A recessive trait must have two same copies coming from the same two parents
Example: HH