Which of these is true of algae, bacteria, and flowering plants? a they are composed of cells. b they all have chlorophyll. c they all feed off other organisms. d they are inorganic.

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?