Only the bases varies from one nucleotide to another.
I don’t know if this is a question but yes a controlled experiment allows you to isolate and test the hypothesis
It is important because the results would not be reliable since other variables you are not testing could have been in affect.
Hope this helps(;
<span>Two haploid cells are </span>produced by any parent cell that undergoes mitosis, four haploid cells require other things as well.