Bio Final 1

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Author:
Danielvu28
ID:
121661
Filename:
Bio Final 1
Updated:
2011-12-07 19:35:03
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Plant systems
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Description:
First section Plant Systems 40 questions.
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  1. How do we rely on plants?
    FOR FOOD, RAW MATERIALS (such as cotton) & MEDICINES
  2. How did farmers develop successful corn, broccoli and cabbage crops?
    VIA SELECTIVE BREEDING
  3. What is the disadvantage of vegetative reproduction or cloning in plants?
    • CONDITIONS IN THE PHYSICAL ENVIRONMENT CAN SUDDENLY CHANGE
    • LEAVING THE CLONES DOOMED TO EXTINCTION
  4. Which male angiosperm organ produces pollen?
    ANTHER
  5. What are the essential features of the pistil (the female organ of the flower)?
    STYLE, STIGMA, OVARY
  6. What are the characteristics of flowers pollinated by animals such as bees?
    • BRIGHTLY COLORED, PRODUCE NECTAR TO ATTRACT POLLINATORS,
    • POLLINATE MORE EFFICIENTLY THAN WIND POLLINATORS
  7. What is the period called when the seed is alive but not growing?
    DORMANCY
  8. What is the advantage of seed dormancy?
    • THE PLANT CAN POSTPONE GERMINATION UNTIL ENVIRONMENTAL
    • CONDITIONS ARE IDEAL
  9. What characterizes seeds spread via wind?
    THEY ARE LIGHTWEIGHT.
  10. How are seeds dispersed by animals such as raccoons characterized?
    BY FLESHY, NUTRITIOUS FRUITS
  11. What is it called when the seed emerges from dormancy and begins to grow?
    GERMINATION
  12. Which plant hormone stimulates cell elongation and rapid growth in the stem and root tips?
    AUXINS
  13. Which part of the plant releases ethylene gas?
    FRUIT
  14. What is the effect of ethylene gas?
    IT ACCELERATES FRUIT RIPENING.
  15. What is THE plant growth hormone (which acts most effectively on stem & fruit size)?
    GIBBERELLIN
  16. What phenomenon causes a bean sprout to tilt 60 deg from the vertical towards the
    sun?
    POSITIVE PHOTOTROPISM
  17. What tropism does ivy climbing up a wall display?
    THIGMOTROPISM
  18. What is the plant responding to when it changes along with the day length or season?
    PHOTOPERIOD
  19. What causes the leaves to change color in the fall/autumn?
    • INCREASED PRODUCTION OF ANTHOCYANIN (a red pigment) & DECREASED
    • PRODUCTION OF CHLOROPHYLL (a green pigment)
  20. What makes up the vascular tissue of plants?
    XYLEM & PHLOEM
  21. What causes root pressure?
    ACTIVE TRANSPORT OF SOIL IONS INTO THE VASCULAR CYLINDER
  22. What is adhesion?
    • THE ATTRACTION OF WATER MOLECULES TO OTHER MOLECULES (such as
    • glass)
  23. Through which plant cells does water move by capillary action?
    XYLEM CELLS
  24. How would you describe the internal water pressure of guard cells when the stomate is
    open?
    HIGH
  25. When do stomata open?
    DURING THE DAY IF THE PLANT HAS ENOUGH WATER
  26. Why are stomata found mostly on the underside of the leaf?
    WATER LOSS WOULD BE LESS ON THE SHADED SURFACE
  27. What would likely happen if an oak tree’s xylem was destroyed?
    • THIS WOULD HAMPER THE PLANT’S ABILITY TO CONDUCT WATER TO THE
    • LEAVES
  28. What might a thin tree ring indicate?
    A YEAR OF DROUGHT
  29. What explains the movement of sugars/sap in a plant?
    THE PRESSURE-FLOW HYPOTHESIS
  30. What are the 3 major parts of the pressure-flow hypothesis?
    • 1st WATER MOVES FROM THE XYLEM TO THE PHLOEM OF THE PLANT
    • 2nd WATER IS NECESSARY FOR SUGARS TO MOVE THROUGH THE PLANT
    • 3rd PHLOEM IS ABLE TO MOVE SUGAR IN ANY DIRECTION TO MEET THE

    METABOLIC NEEDS OF THE PLANT
  31. Cacti have fat stems and miniscule leaves...how have cactus stems taken over leaf
    function?
    • THE CACTUS STEMS PRODUCE FOOD BY PHOTOSYNTHESIS (normally this is
    • done by leaves)
  32. What is one thing that stems can do that roots cannot?
    PHOTOSYNTHESIZE
  33. Which organ of the plant is adapted for photosynthesis?
    LEAVES
  34. Where in the leaf does photosynthesis occur?
    MESOPHYLL
  35. What is the outer covering of a plant?
    DERMAL TISSUE
  36. Which part of the root, if damaged, would halt root growth?
    APICAL MERISTEM See p. 670
  37. What encloses the vascular tissue in the root?
    ENDODERMIS

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