DENDROLOGY

Detailed explanation-1: -There are two kinds of conducting elements (i.e., transport tubes) found in the xylem: 1) tracheids and 2) vessels (Figure 6). Tracheids are smaller than vessels in both diameter and length, and taper at each end.

Detailed explanation-2: -The “stickiness” between water molecules and the xylem vessel walls is called adhesion. Cohesion and adhesion work together in the xylem to pull water molecules from the roots, up the stem, and out of the plant through the stomata. The flow of water transport is impacted by the plant rate of transpiration.

Detailed explanation-3: -The water-carrying tubes (xylem) transport both water and mineral salts from the roots to all parts of the plant while the food-carrying tubes (phloem) carry food made by the leaves to all parts of the plant.