What substance must plants produce in order to make lipids?

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

About __ of the mass of the cell is water

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?