Bio 102 Quiz #6

25 Questions | Total Attempts: 718

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Bio Quizzes & Trivia

Questions and Answers
  • 1. 
    Which of the following is a health benefit associated with increasing the amount of soybeans in the human diet?
    • A. 

      Decreased LDL levels

    • B. 

      Removal of antioxidants from the body

    • C. 

      Decreased amount of fiber in the diet

    • D. 

      Increased levels of triglycerides

    • E. 

      Decreased HDL levels

  • 2. 
    Plants grow towards the light through the action of:
    • A. 

      Enzymes

    • B. 

      Hormones

    • C. 

      Nerves

    • D. 

      Solar Energy

    • E. 

      Chloroplasts

  • 3. 
    Grass shoots bend toward the light because, on the shadowed side, a(n):
    • A. 

      Reduction in auxin levels promotes cell elongation

    • B. 

      Reduction in gibberellin levels promotes cell elongation

    • C. 

      Reduction in auxin levels prevents cell elongation

    • D. 

      Increase in auxin levels promotes cell elongation

    • E. 

      Increase in auxin levels promotes cell division

  • 4. 
    The plant growth response to touch is known as:
    • A. 

      Gravitropism

    • B. 

      Geotropism

    • C. 

      Bolting

    • D. 

      Thigmotropism

    • E. 

      Phototropism

  • 5. 
    Plant hormones:
    • A. 

      Must be produced in large quantities to be effective

    • B. 

      Act on all cells they encounter

    • C. 

      Usually work independently of each other

    • D. 

      Are chemical signals that influence growth and development

    • E. 

      Are rare and produced only in response to stress

  • 6. 
    Which of the following statements about plant hormones is true?
    • A. 

      Plant hormones are produced in very small concentrations

    • B. 

      Plant hormones mainly affect reproductive processes

    • C. 

      Individual hormones typically have, single specific effects

    • D. 

      Plant hormones have little or no effect on plant growth

    • E. 

      Plant hormones play a vital role in photosynthesis

  • 7. 
    Which is the main effect of auxins on plant growth?
    • A. 

      They reduce growth by inhibiting cell division

    • B. 

      They increase growth by promoting cell division and elongation

    • C. 

      They increase growth by increasing the rate of photosynthesis

    • D. 

      They reduce growth by preventing cell elongation

    • E. 

      Auxins have no effect on plant growth

  • 8. 
    If the auxin that is produced by an apical meristem is transported in equal amounts down all sides of a twi, the twig will probably:
    • A. 

      Elongate evenly

    • B. 

      Branch near its tip

    • C. 

      Flower

    • D. 

      Develop fruit

    • E. 

      Bend away from the apical meristem

  • 9. 
    When a nursery worker pinches off the terminal buds on a young chrysanthemum plant to make it grow bushy, which of the following plant hormones is mainly responsible for growth of side branches?
    • A. 

      An auxin

    • B. 

      A gibberellin

    • C. 

      A cytokinin

    • D. 

      Abscisic acid

    • E. 

      Ethylene

  • 10. 
    Which class of hormones produced in the roots of plants promotes cell division and growth, and retards the aging of flowers and leaves?
    • A. 

      Gibberellins

    • B. 

      Phytochromes

    • C. 

      Cytokinins

    • D. 

      Ethylene

    • E. 

      Abscisic acid

  • 11. 
    In many grocery stores, fresh fruits are sold prebagged in plastic bags dotted with holes so that they will not overripen. The main function of the holes is to:
    • A. 

      Permit the fruit to drain after being washed

    • B. 

      Facilitate the diffusion of ethylene away from the fruit

    • C. 

      Prevent anaerobic conditions within the bag

    • D. 

      Prevent build up of C02

    • E. 

      Facilitate the diffusion of 02 to the fruit

  • 12. 
    Shoot branching is controlled mainly by the interaction of:
    • A. 

      Auxins and Gibberellins

    • B. 

      Auxins and Cytokinins

    • C. 

      Gibberellins and Cytokinins

    • D. 

      Gibberellins and Abscisic Acid

    • E. 

      Cytokinins and Abscisic Acid

  • 13. 
    Ethylene gas is a gaseous hormone produced by plants,often in response to stress. What is another way to produce ethylene?
    • A. 

      As a natural by-product of animal respiration

    • B. 

      Through the evaporation of alcohol

    • C. 

      Through the combustion of kerosene

    • D. 

      Through extraction from the cell walls of algae

    • E. 

      Through the fermentation of soybeans

  • 14. 
    Which of the following hormones might induce seeds treated with it to break dormancy?
    • A. 

      An auxin

    • B. 

      A cytokinin

    • C. 

      A gibberellin

    • D. 

      Abscisic acid

    • E. 

      Ethylene

  • 15. 
    Fruit that forms on an unpollinated plant in response to a hormone will lack:
    • A. 

      Flavor

    • B. 

      Seeds

    • C. 

      Carpels

    • D. 

      Rind

    • E. 

      Naturally occurring hormones

  • 16. 
    Bush beans grow as small bushes rather than as vines because their internodes are short and they branch close to the apical meristem. Which of the following substances, if applied to a bush bean, might cause it to revert to a vine habit?
    • A. 

      A cytokinin

    • B. 

      A gibberellin

    • C. 

      Abscisic acid

    • D. 

      Ethylene

    • E. 

      Phytochrome

  • 17. 
    Which of the following substances induce "bolting" the rapid elongation of a plant stem?
    • A. 

      A cytokinin

    • B. 

      A gibberellin

    • C. 

      Abscisic acid

    • D. 

      Ethylene

    • E. 

      Phytochrome

  • 18. 
    Which type of plant hormone generally acts as a growth inhibitor?
    • A. 

      Auxins

    • B. 

      Gibberellins

    • C. 

      Cytokinins

    • D. 

      Abscisic acid

    • E. 

      Ethylene

  • 19. 
    Which of the following is a way that plants use animals as a defense against herbivores?
    • A. 

      Production of an amino acid that harms herbivores

    • B. 

      Attraction of wasps that kill herbivorous caterpillars

    • C. 

      Release of microbe-killing chemical in response to infection

    • D. 

      Co-evolution between plants and predators

    • E. 

      Production of hormones to induce acquired resistance to herbivores

  • 20. 
    Synthetic auxins are used commercially
    • A. 

      To promote fruit ripening

    • B. 

      To promote seed germination

    • C. 

      To promote flowering in ornamental crops

    • D. 

      To promote side branching to produce bushier crops

    • E. 

      As a broadleaf weed killer

  • 21. 
    Which hormone prevents a seed released in the fall from germinating immediately?
    • A. 

      Auxins

    • B. 

      Abscisic acid

    • C. 

      Gibberellins

    • D. 

      Ethylene

    • E. 

      Cytokinins

  • 22. 
    What stimulates germination of desert plant seeds after a hard rain?
    • A. 

      Production of auxins

    • B. 

      Removal of abscisic acid

    • C. 

      Cooler temperature

    • D. 

      Activation of cytokinins

    • E. 

      Removal of ethylene

  • 23. 
    What dense storage granules in plant cells are thought to contribute to gravitropism?
    • A. 

      Starch

    • B. 

      Lipids

    • C. 

      Cellulose

    • D. 

      Proteins

    • E. 

      Chlorophyll

  • 24. 
    Which of the following would be a good way to ripen a green tomato?
    • A. 

      Putting it in a darkened area such as a drawer or box

    • B. 

      Wrapping it in foil and putting in the refrigerator

    • C. 

      Placing it in a sealed plastic bag with an overripe banana

    • D. 

      Placing it in a microwave, on low power, for 5 minutes

    • E. 

      Placing it under a bright light for 24 hours

  • 25. 
    Which of the following growth repsonses cause the shoots of a plant grown in the dark to grow upward?
    • A. 

      Phototropism

    • B. 

      Thigmotropism

    • C. 

      Photoperiodism

    • D. 

      Gravitropism

    • E. 

      Heterotropism

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