In prokaryotic cells, this molecule is
not enclosed within a nucleus.
Explanation:
Prokaryotes are living thing organisms that lack organelles or alternative internal membrane-bound structures. Therefore, they are doing not have a nucleus, but, instead, typically have one chromosome: a bit of circular, double-stranded desoxyribonucleic acid placed in a region of the cell known as the nucleoid.
Right before it starts to decline (fall)
I guess the answer is C. muscular. I not really sure on this answer so :)
It's either B or D but probably B