Xylem consists of which cells?

A) tracheids only
B) sieve elements only
C) vessel elements only
D) sclerenchyma fibers and sieve elements
E) tracheids and vessel elements

Tracheids

Long, thin cells found in the xylem of vascular plants, serving as basic water-conducting elements and structural support.

Vessel Elements

are elongated cells found in the xylem of plants, facilitating water transport.

Sclerenchyma Fibers

Thick-walled, rigid cells that provide structural support to plants, often found in stems, leaves, and roots.