Hey there!
I believe answer is B2 or Beta 2
I'm having trouble on this too :(
I think its the left one (sorry if im wrong)
Answer:
Chromosomes are made up of DNA(deoxyribosenucleicacid) which is a protein complex called chromatin that is organized into subunits called nucleosomes. The way in which eukaryotes compact and arrange their chromatin also helps regulate gene expression.
Explanation:
D) Yes, the need to conserve copper must be balanced with use.
