A mutation in the code for a trait may not always change the expression of that trait. What advantage does this provide cells? Ribosomes can produce proteins more quickly.
Cells only need to make a limited number of proteins.
Proteins can switch tasks without a change in the DNA sequence.
Some changes in the DNA sequence will not cause a change in the protein produced.

Some changes in the DNA sequence will not cause a change in the protein produced.

Explanation:

My reasoning is, if the mutation is not expressed then the changes in the DNA sequence will not affect the coding for whatever protein will be produced. The mutation won't affect anything, it is like the mutation is invisible. I hope it helps plus by process of elimination the others would be wrong.

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )