Study Guide Exam IIILecture 13 (Chapter 35)- plant structureHow are plant cells like all other cells?
What is xylem?Tubolar elongated cells dead at maturity that transport water from roots to leavesWhat are xylem cells?Tracheids: tapered ends, water moves through pits without secondary walls. Secondary walls have lignin for support.Vessels: shorter, thinnerwalls and not as tapered. Arranged end to end forming pipes. What does xylem do?Water transport.What is a protoplast?Cell without cell wall. What does the plant cell wall do?Protects and supports. What are plasmodesmata?Perforations in cell wall allowing nutrient exchange.Where do shoots and roots grow?Shoots – aprical meristems and lateral meristems (vascular and cork cambiums)What are buds?What are meristems?Perpetually embryonic tissues. Where are meristems located?What do leaf and bud scars on twigs indicate?What is primary growth?What is secondary growth?What are the various structures found near a root tip?SteleApical meristemProcambiumProtodermGround meristemWhat is a root hair?What are the various structures found near the growing shoot tip?