BIO 1002 Chapter 21 Plants

BIO 1002 Chapter 21 Plants - Chapter 21: The Plant Kingdom...

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Chapter 21: The Plant Kingdom Phyta = plant A. Characteristics of more complex plants 1. Roots - their circulatory system 2. xylem and phloem vessels - a system of pipes that allow the plants to be multi-cellular and very big 3. lignin - found in the cell wall; strengthens the plant; cross-links the cellulose 4. cuticle - waxy layer seen on leaves that prevents water loss 5. stomata - **specialized pores on the bottom of the leaf; when open, it lets the CO 2 into the leaves; controlled by water and CO 2 6. different reproductive methods - water no longer needed for reproduction, use something else: pollen; before land plants everything evolved in the water the water not needed is significant because now they can live on land B. Land Plants 1. Non-vascular plants- bryophytes a. They have no vascular tissue: they don’t have xylem and phloem they have to stay small (2-3 cm) b. No true roots, stems or leaves c. Stomata and cuticle only in some d. Semi-aquatic because they require water for reproduction
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This note was uploaded on 10/16/2008 for the course BIOL 1002 taught by Professor Pomarico during the Spring '08 term at LSU.

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BIO 1002 Chapter 21 Plants - Chapter 21: The Plant Kingdom...

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