Answer:
Amino acids are the building blocks of proteins
There are many possibilities that could happen if the sequence of amino acids were to change. It could potentially create a completely different protein with a different function, or it could create a more efficient protein but this is less likely. 
Explanation:
 
        
             
        
        
        
Answer- C Genetic Drift Geographic Isolation.
        
                    
             
        
        
        
Answer:
A scientific name is used around the world so there will be no confusion identifying the organism but common names vary from place to place. 
Explanation:
I just know this stuff
 
        
                    
             
        
        
        
<span>im not sure but ig cells, organs, and organisms</span>
        
             
        
        
        
A leech is an example of a parasite