The two principal types of conducting cells in the xylem are _________ and ________.
A)tracheids;vessel elements
B)sieve tubes;companion cells
C)sieve cells;sieve tube members
D)guard cells;tracheids
E)protoderm cells;pericycle cells

Question

Quizplus · Accepted Answer

Tracheids and vessel elements are the two principal types of conducting cells in the xylem. Tracheids are long, narrow cells with tapered ends that overlap and allow water to move through pits. Vessel elements, on the other hand, are shorter and wider cells that are stacked end to end to form long tubes. Both types of cells function to transport water and minerals from the roots to the leaves of a plant.

The Two Principal Types of Conducting Cells in the Xylem