common descent means the evolutionary in biology and how they have something linked with their common ancestors.
 
        
                    
             
        
        
        
An experiment to support the hypothesis, and then a conclusion that either supports or refutes the hypothetical statement
        
             
        
        
        
I believe the answer would be “B” Srry not good with science
        
             
        
        
        
Answer:
A Siamese cat has genes that affect it’s fur color. 
Explanation: