Which of the Following Statements Is False Concerning the Xylem

question 55

Multiple Choice

Which of the following statements is False concerning the xylem?

• A)Xylem tracheids and vessels fulfill their vital function only after their death.
• B)The cell walls of the tracheids are greatly strengthened with cellulose fibrils forming thickened rings or spirals.
• C)Water molecules are transpired from the cells of the leaves, and replaced by water molecules in the xylem pulled up from the roots due to the cohesion of water molecules.
• D)Movement of materials is by mass flow; materials move owing to a turgor pressure gradient from "source" to "sink."
• E)In the morning, sap in the xylem begins to move first in the twigs of the upper portion of the tree, and later in the lower trunk.

---

Definitions:

Dense Connective Tissue

A type of connective tissue with high tensile strength that provides support and protection, composed mainly of tightly packed collagen fibers.

Strength

The quality or state of being physically strong, the capacity of an object or substance to withstand great force or pressure.

Cartilage

Cartilage is a flexible, resilient connective tissue found in various parts of the body, providing support and cushioning at joints.

Blood Vessels

Tubes in the body through which blood flows, including arteries, veins, and capillaries.