3) Dermal Tissue System - Forms an outer protective covering of the plant. - Covers and protects the plant surface from drying out, pathogens, & insects.
Chapter 6 Stems I. External forms of a Woody Twig A. Attachments of leaves to a twig 1. Alternate (one leaf) 2. Opposite (two leaves) 3. Whorled (3 or.
Secondary Growth of Stems - due to division of lateral meristems 1. Vascular Cambium - derived from.
