The difference is because there about different from one another, the reflexes will act different towards the speed
        
             
        
        
        
<h3><u>Answer;</u></h3>
b). Activation of an upstream guanine nucleotide exchange factor
<h3><u>Explanation</u>;</h3>
- <em><u>When a ligand activates the G protein-coupled receptor, it induces a conformational change in the receptor that allows the receptor to function as a guanine nucleotide exchange factor (GEF) that exchanges GDP for GTPthus turning the G protein-coupled receptor on.</u></em>
- The activated G-protein then dissociates into an alpha (G-alpha) and a beta-gamma complex. 
 
        
        
        
Hard, dense bone tissue that is beneath the outer membrane of bone <span />
        
             
        
        
        
A=2 
B=red blood cells rely on catalase, catalase decomposes hydrogen peroxide 
C=The effect of replacing his is that the hydrophobic amino acid would not do well with water 
D= the hydrophobic amino acid is like oil and water and wouldn’t do well decomposing hydrogen peroxide
        
             
        
        
        
 They are related because genetics change during evolution.