Can I get brainlyest? And I’ll answer in comments
        
             
        
        
        
Answer:
<em>In biochemistry and pharmacology, receptors are chemical structures, composed of protein, that receive and transduce signals that may be integrated into biological systems</em>
 
        
             
        
        
        
Answer:
A
Explanation:
 it holds water in the plant 
 
        
             
        
        
        
Distribute the A to the B and the b, then the a to the B and the b. You should get four different possible combinations: AB Ab aB ab. These would then be used to set up one side of a punnett square, and the other parent's genotype would be set up the same, then put on the other side of the punnett square.