Chap. 35 Plant Structure and Growth AP Biology Mr. Orndorff April 2004

Monocots vs. dicots (Fig. 35.3)

Morphology of a flowering plant (Fig. 35.4)

Primary growth of a root (Fig. 35.15)

Plant tissues Tissue Type Structure Function parenchyma collenchyma Thin primary cell walls, protoplast with large central vacuole. Least specialized; syn-thesize and store organic molecules. collenchyma Unevenly thickened primary cell walls, grouped in strands or cylinders Help support growing parts of young plants sclerenchyma Secondary cell walls made rigid with lignin; often dead at maturity. Support and protect non-growing regions of plant xylem Secondary cell walls, end walls perforated; dead at maturity. Conduct water upward and help support plant. phloem Protoplasts lack nucleus, ribosomes, vacuole; living at maturity. Transport organic molecules throughout plant.

Plant tissue systems (Fig. 35.12)

Leaf anatomy (Fig. 35.20a)

Modular construction of a shoot (Fig. 35.21)

Production of secondary xylem and phloem by vascular cambium (Fig. 35

Secondary growth of a stem (Fig. 35.24)

Anatomy of a tree trunk (Fig. 35.25)