Murray's Law predicts the thickness and branching pattern of these plant tissues, whose name comes from the Greek word for wood. Composed of tracheids and vessel elements, they distribute water and nutrients from roots to shoots and leaves. This tissue's counterpart is phloem, and it uses capillary action for movement. For 10 points, name this transport tissue in vascular plants, which uses adhesion and cohesion to move water molecules through it.
a) Xylem
b) Phloem
c) Parenchyma
d) Collenchyma