BIOL 1002 Lecture : Notes Plants As Of 10 25
Document Summary
The roots of many orchids are photosynthetic (root is green, chloroplasts present on the root). Example: spanish moss ! is actually angiosperm because it produces flowers: stems support branches, flowers (become fruits), leaves, etc, some plants have specialized water-storage stems. # xylem ! has vessel element, tracheids; cells are dead at functional maturity (dead) # phloem ! never dies unless the plant dies; has sleve- tube element and companion cell (alive: ground tissue " neither epidermal nor vascular tissues; $ perform most metabolic functions (activities) of plant: 1. Photosynthesis (if found on the leaves): food storage (if found on the ground), 3. $ examples: hardness to nutshells, hardness of peach pits, and the gritty texture to pears: primary growth in roots lengthens roots from the tips, 1st: zone of cell division (apical and primary meristems) # at the very tip of the root is the root cap that continually sloughs off to protect the root apical meristem.
