Topic 9 - Plant Science

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Author:
ENason
ID:
129974
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Topic 9 - Plant Science
Updated:
2012-05-24 06:49:51
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IB DP BIO PLANT SCIENCE
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IB DP BIO PLANT SCIENCE
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  1. Name 4 different kinds of roots
    • PROP ROOTS
    • STORAGE ROOTS
    • PNEUMATOPHORES
    • BUTTRESS ROOTS
  2. Give the meaning and an example of PROP ROOTS
    • thick adventitious roots that grow from lower part of the stem and brace the plant
    • e.g. corn
  3. Give the meaning and an example of a storage root
    • specialized cells within root store large quantities of carbohydrates and water
    • e.g. Carrots and beets.
  4. Give the meaning and an example of a pneumatophore
    • produced by plants that live in wet places. Roots extend above soil or water surface to facilitate oxygen uptake.
    • e.g. mangrove and cypress trees
  5. Give the meaning and an example of a buttress root
    • large roots that develop near bottom of trees to provide stability
    • e.g. fig tree
  6. Is this a dicot or monocot stem or root?
    Dicotyledon stem
  7. Is this a dicot or monocot stem or root?
    Monocot stem
  8. Is this a dicot or monocot stem or root?
    monocot root
  9. Is this a dicot or monocot stem or root?
    dicot root
  10. Name 4 different modifications of stems
    • Stolons - eg strawberry plants
    • Tubers - eg potato
    • Rhizomes - eg ginger plant
    • Bulbs - eg onion
  11. Name 4 different modifications of leaves
    • Tendrils - eg pea plants
    • Reproductive leaves - eg Kalanchoe plant
    • Bracts or floral leaves - eg Pointsettia
    • Spines - eg cactus
  12. What do the terms determinate and indeterminate mean?
    • Determinate = grows to a certain size and then stops (like animals)
    • Indeterminate = keeps on growing throughout life
  13. What is APICAL MERISTEMATIC TISSUE?
    • Is found at tips of roots and shoots.
    • Allows roots/shoots to get longer.
    • Causes primary growth
  14. What are LATERAL MERISTEMS?
    • Allows growth in the thickness (girth) of plants.
    • Causes secondary growth
  15. Movement of organic molecules in a PLANT is called...
    Translocation
  16. In terms of a plant, what is a source?
    A producer of sugar by photosynthesis or by hydrolysis of starch e.g. Leaves
  17. In terms of a plant, what is a sink?
    A plant organ that uses or stores sugar e.g. Roots, buds, stems, seeds and fruits.
  18. Is this dicot or monocot.
    Label the parts.
    • 1 = phloem
    • 2 = cambium
    • 3 = xylem
    • 4 = pith
    • 5 = cortex
    • 6 = epidermis
  19. Look at the diagram.
    What kind of way is water taken up from
    i) route b to d
    ii) route e to f
    • Route b to d = symplast route (through the cytoplasm of adjacent cells)
    • Route e to f = apoplast route (through cellulose cell walls from one cell to next)
  20. Label the leaf (TS) transverse section
    • 1 = stomata
    • 2 = spongy mesophyll layer
    • 3 = palisade mesophyll layer
    • 4 = upper epidermis
    • 5 = waxy cuticle
    • 6 = vascular bundle
    • X = xylem
    • P = phloem
  21. What kind of root is this?
    storage root
  22. What kind of root is this?
    pneumatophore (like mangrove)
  23. What is a xerophyte?
    A plant that is adapted to grow in very dry habitats.
  24. What adaptations do xerophytes have?
    • Vertical stems to absorb sunlight early and late in day, but not at mid-day
    • CAM physiology = open stomata during cool nights rather than intense heat of day
    • Very waxy cuticle covering the stem
    • Spines instead of leaves to reduce surface area for transpiration
  25. How is potassium mostly absorbed by the root?
    Active transport
  26. What is a tendril?
    A thread-like structure used by climbing plants for support and attachment

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