Chapter 39-control Systems In Plants

11 Questions | Total Attempts: 261

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Plant Quizzes & Trivia

A short quiz to test your knowledge on the control systems used by plants.


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Questions and Answers
  • 1. 
    What does auxin do to plants?
    • A. 

      Inhibits growth

    • B. 

      Promotes elongation

    • C. 

      Ripen fruits

    • D. 

      Fights disease

  • 2. 
    If apical dominance is removed from a plant, what results?
    • A. 

      The plant stops growing

    • B. 

      The plant grows upward

    • C. 

      The plant germinates

    • D. 

      The plant grows outward

  • 3. 
    Plants shed leaves regularly.  This is apoptosis (programmed cell death) in plants.  It is prompted by
    • A. 

      Ethylene

    • B. 

      Gibberelins

    • C. 

      Auxins

    • D. 

      Cytokinins

  • 4. 
    Far red absorbing phytochrome is _______ in color and influences ____________.
    • A. 

      Red, closing of the stomata

    • B. 

      Red-yellow, flowering

    • C. 

      Violet, ripening

    • D. 

      Blue-green, germination

  • 5. 
    Response to touch, that allows a plant to react by becoming flaccid or curling around a pole is
    • A. 

      Gravitropism

    • B. 

      Thigmotropism

    • C. 

      Statoliths

    • D. 

      Geotropism

  • 6. 
    The primary purpose of abscisic acid in seeds is
    • A. 

      Dormancy

    • B. 

      Germination

    • C. 

      Organogenesis

  • 7. 
    When do short day plants flower?
    • A. 

      Spring and early summer

    • B. 

      Late summer and fall

    • C. 

      Fall and winter

    • D. 

      Winter and early spring

  • 8. 
    Which of the following does ethylene not do?
    • A. 

      Abscission

    • B. 

      Cuticle production

    • C. 

      Leaf loss

    • D. 

      Auxin opposition

  • 9. 
    The receptor protein for greening is
    • A. 

      Cytochrome

    • B. 

      Cryptochrome

    • C. 

      Phytochrome

    • D. 

      Chlorochrome

  • 10. 
    Auxin causes elongation by
    • A. 

      Activating expansins to loosen H bonds between cellulose fibers

    • B. 

      Inhibiting dormancy

    • C. 

      Activating enzymes to amplify the phytochrome signal

    • D. 

      Initiating chlorophyll production

  • 11. 
    Which hormone is produced by plants to break seed dormancy?
    • A. 

      Auxins

    • B. 

      Gibberelins

    • C. 

      Abscissic acid

    • D. 

      Cytokinins