Suppose that frogs can have either high blood pressure or low blood pressure and this is controlled by bands 10-12.the dna scan below is form a frog that has low blood pressure. which dna scan below was also obtained from a frog with low blood pressure

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?