Hello the correct answer would be D When a molecule of double-stranded DNA undergoes replication, it results i a two double-stranded DNA molecules, each composed of one and one old strand. trust me I had this last semester and finished with an A-
 
        
                    
             
        
        
        
cloudiness rain and animals brudda.
 
        
                    
             
        
        
        
To the heart: pulmonary vein 
Away from heart: pulmonary artery
        
             
        
        
        
A cancer causing gene is caused by a mutation in a gene.