What is a major difference between prokaryotes and eukaryotes?

Which of the following represents a negatively charged ion? of t 7

What enzyme is most important for dna replication and why?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?