biology chapter 29

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Steffyy.xd
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87926
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biology chapter 29
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2011-05-26 18:05:28
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biology 29
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  1. Dermal tissue (epidermis)
    • Function is protection
    • Cuticle ( waxy coat) prevents water loss
    • Stomata: regulates gas exchange
  2. Ground tissue
    • Fills in between dermal an vascular tissue
    • Metabolic function( photosyntheses and cellular respiration)
    • Storage (ex. Carrots)
    • Provides support in yhe center of roots and stems
  3. Xylem
    • Transports h2o and minerals upward
    • Provides structural support
    • Dead at maturity
  4. Tracheid
    • Long tapered
    • Walls have pits
  5. Vessel elements
    • Wider shorter
    • End walls perforated or gone completely
    • H2o moves easier
  6. Phloem
    Cells called sieve tube membersTransport foodAlive at maturityEnd walls ( sieve plates)
  7. Companion cell
    Along side each sieve tube memberProvides nucleus and ribosomes
  8. Meristem:
    Region of activly dividing cells
  9. Apical meristem
    • tips of roots and buds of stems
    • Primary growth= elongation
  10. Lateral meristems
    Cylinder of cells in woody plantsSecondary growth= thickness
  11. Vascular cambium
    Between the xylem and phloemMakes more vascular tissue
  12. Cork cambium
    Outside phloemMakes cork ( replaces epidermis)
  13. taproot
    ex.carrot
  14. fibrous root system
    grasses and many other monocots
  15. adevntitous root
    prop root of corn
  16. aerial roots
    get H2O from air
  17. root cap
    • Protection
    • Pollysachride slime
  18. root hairs
    • Increase surface area
    • Increase h2o absorption
  19. root functions
    • Anchor the plant
    • Absorb h2o and dilutes
    • Storage
    • - carbs (starch)- carrots turnips
  20. nodes
    point where one or more leaves are attached
  21. bud (meristematic)
    makes a new shoot- bud scales cover, later buds(sides), terminal bud(tip)
  22. stolon
    above ground, horizontal
  23. rhizomes
    • underground, horizontal
    • - sometimes have tubers at the end (potatoes)
  24. bulbs
    vertical underground shoots
  25. vascular bundles
    • - primary xylem inside...primary phloem outside
    • Monocots: scattered
    • Dicots: ring
  26. secondary growth in stems (girth)
    • Rare in monocotsCommon in dicots
    • Cells between primary xylem and primary phloem become vascular cambium
  27. bark
    PhloemCork cambiumCork- prevents infection and water loss
  28. translocation
    • Transport food
    • Carried by sieve tube members (phloem)
    • Source to sink transport
  29. source
    organ of sugar production
  30. sink
    organ that consumes or stages the sugar
  31. mesophyll =ground tissue
    - palisade- upper- ps- spongy- lower- ps and has exchange

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