<span>as you need to produce different phenotypes from the same genotype you need to regulate gene expression (turn some on, others off).</span>
        
             
        
        
        
B. specific to a substrate
        
             
        
        
        
The nurse can follow
these following tips:
For temporary relief
of dryness of mouth from antihistamines:
1. the patient can
chew on sugarless gums
2. the nurse can let
the patient have bits of ice melt in their mouth
3. or the nurse can
give a saliva substitute
If dryness of mouth
does not go away after 2 weeks, seek doctor’s help.
 
        
                    
             
        
        
        
I guess the answer is B !! as it has no relevance and is not an observation !!