Question

The conducting cells of xylem are______________.

• A. Tracheary elements
• B. Sieve elements
• C. Companion cells
• D. All of the above

Answer 1

Answer: (A)

The conducting cells of xylem are tracheary elements. The tracheary element is the constituent of vessels and tracheids. These are mainly involved in the transport of water and structural support.

In-plant anatomy, sieve tube elements, also called sieve-tube members, are a specialized type of elongated cell in the phloem tissue of flowering plants. The ends of these cells are connected with other sieve-tube members and together they constitute the sieve tube.

Companion cell. any of a number of specialized parenchyma cells adjacent to a sieve tube in the phloem of flowering plants believed to regulate the flow of nutrients through the tube.

So, the correct answer is option A.