Xylem is used to transport water and nutrients from the roots up to the rest of the plant.
they maybe use glucose or energy source
Mosses
Xylem is WOOD (including lumber, and wood products) You should be able to answer the rest.
Xylem is the layer of wood in a tree next to the heartwood (dead center of a tree) and it carries water down and up the tree.
All plants use xylem and phloem vessels.