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.

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Definitions:

Adaptation-level Phenomenon

The psychological process by which individuals adjust their expectations based on their previous experiences.

Learned Helplessness

A condition in which a person suffers from a sense of powerlessness, arising from a traumatic event or persistent failure to succeed, leading to decreased motivation and learning capacity.

Release of Cortisol

The Release of Cortisol refers to the secretion of the hormone cortisol by the adrenal glands, often in response to stress, which plays a crucial role in many body functions.

Blood Flow

The movement of blood through the circulatory system, delivering nutrients and oxygen to cells and removing waste products.