Final answer:
The statement that primary xylem consists of tracheids, vessel elements, parenchyma, and fibers is true. These components are essential for water transport and providing structural support in the plant.
Step-by-step explanation:
The statement that primary xylem consists of tracheids, vessel elements, parenchyma, and fibers is true. The xylem is a vital vascular tissue in plants, primarily responsible for the conduction of water and minerals from roots to stems and leaves. Within the xylem, tracheids and vessel elements are specialized for water conduction and are dead at maturity. These cells have secondary cell walls that are lignified, providing strength and allowing for the transport of water through pits in tracheids and perforation plates in vessel elements.
Xylem parenchyma serves as a support tissue within the xylem and has a role in both storage and the lateral movement of water and solutes. Fibers, also present in xylem, are elongated sclerenchymatous cells that contribute additional support to the plant structure. Together, these components are fundamental for the function and structure of the primary xylem.