BIOL 1202 Chapter : Chapter 35 Learning Objectives
Document Summary
Describe root hairs: roots anchor a vascular plant in the soil, absorbs minerals and water, and often stores carbohydrates. Root hairs emerge near the tips of roots and increase the surface area of the root enormously. It is a thin, tubular extension of a root epidermal cell. In the upper angle formed by each leaf and the stem is an axillary bud, a structure that can form a lateral shoot, commonly called a branch. If an animal eats the end of the shoot or if shading results in the light being more intense to the side of the shoot, axillary buds break dormancy (start growing). The vascular tissue system, which transports materials between the root and shoot systems, is also continuous throughout the plant, but is arranged differently in each organ. The nucleus and ribosomes of the companion cell serve not only that cell itself but also the adjacent sieve-tube element.
