The dense area of a cell that contains nucleic acid is

As a small change in a person's dna can cause a genetic disorder

All eukaryotic cells contain small bodies called

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?