Enzymes reduce the activation energy allowing chemical reactions to occur in living things.
        
             
        
        
        
Answer:
The children can have all of the following, AB, A and B.
Explanation:
Within a Punnett square, BO and AB can only make AB, Ao, BB and BO.
 
        
             
        
        
        
The right answer is The number of adenine will be equal to the number of thymine.
Chargaff's rules indicate that the DNA of any cell or organism must have a ratio of 1 to 1 between purine bases and pyrimidine bases and, more specifically, that the amount of guanine is equal to the amount cytosine, and that the amount of adenine is equal to the amount of thymine. This trend is found in both strands of DNA.