Answer:D. A change to one amino acid in a protein may cause a significant change in phenotype.
 
        
             
        
        
        
Ecosystem .. Just took the test !
        
                    
             
        
        
        
Answer:
I believe it is convergent boundaries 
Explanation:
 
        
                    
             
        
        
        
I would say A is the correct answer. B and C are definitely wrong, and I think D is talking about genes and not chromosomes.
        
             
        
        
        
Answer:
The answer is mass and distance.
Explanation: