I am not sure but I am guessing carbon and nitrogen :)
Chargaffs rules states that dna from any cell of all organisms should <span>have a 1:1 ratio (base Pair </span>Rule<span>) of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.</span>
Answer:
The answer is "B: They both involve duplicating chromosomes'
Explanation:
It was A. I also do pacyber!