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Growth and Development in Plants

Chapter 26. Growth and Development in Plants. Which of the following most directly controls the flowering response in short-day plants? length of the light period length of the dark period relative amounts of blue light available intensity of light during the light period

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Growth and Development in Plants

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  1. Chapter 26 Growth and Development in Plants

  2. Which of the following most directly controls • the flowering response in short-day plants? • length of the light period • length of the dark period • relative amounts of blue light available • intensity of light during the light period • air temperature during the dark period Answer: b

  3. The coiling of a vine around a pole is due to • phototropism • gravitropism • thigmotropism • circadian rhythms • photoperiodism Answer: c

  4. In plants, the initiation of flowering in response • to photoperiod is triggered by changes in • ethylene • gibberellic acid • auxin • phytochrome • cytokinin Answer: d

  5. a. Indoleactic acid (IAA) • b. Cytokinin • c. Gibberellin • d. Ethylene • e. Abscisic acid • A gas the hastens fruit ripening • Promotes germination • Stimulates activation of proteins for mitosis Answer: d Answer: c Answer: b

  6. Signal Transduction Pathway

  7. De-etiolation Etiolation

  8. (coleoptile)

  9. Phototropism (positive) caused by plant hormone

  10. Gravitropism (negative) (positive)

  11. Thigmotropism tendrils

  12. Thigmomorphogenesis

  13. Seismonastic movement turgor pressure differences (K+)

  14. Circadian Rhythms Short day lettuce mum Long day Photoperiodism Day neutral African violet

  15. phytochrome

  16. halophyte

  17. Physical and chemical defenses against herbivores

  18. SAR= Systemic acquired resistance • Chemicals that spread the • “alarm” of infection Salicylic acid

  19. The coiling of a vine around a pole is due to • phototropism • gravitropism • thigmotropism • circadian rhythms • photoperiodism Answer: c

  20. Which of the following most directly controls • the flowering response in short-day plants? • length of the light period • length of the dark period • relative amounts of blue light available • intensity of light during the light period • air temperature during the dark period Answer: b

  21. a. Indoleactic acid (IAA) • b. Cytokinin • c. Gibberellin • d. Ethylene • e. Abscisic acid • A gas the hastens fruit ripening • Promotes germination • Stimulates activation of proteins for mitosis Answer: d Answer: c Answer: b

  22. In plants, the initiation of flowering in response • to photoperiod is triggered by changes in • ethylene • gibberellic acid • auxin • phytochrome • cytokinin Answer: d

  23. Chapter 27 Plant Reproduction

  24. Only female gametes are produced in which • of the following structures? • antheridia • stamens • protonemata • flowers • archegonia Answer: e

  25. Which is true of seeds? • They contain the gametophyte. • They are characteristic of all plants. • They are a mechanism for pollen dispersal. • They are not characteristic of conifers. • They contain the cotyledon. Answer: e

  26. Which of the following occurs after fertilization? • The ovule becomes the seed, the ovary • becomes the fruit. • b. The ovary becomes the seed, the ovule • becomes the fruit. • c. The micropyle becomes the seed, the sepals • become the fruit. • d. The stigma becomes the seed, the ovule • becomes the fruit. • e. The micropyle becomes the seed, the ovary • becomes the fruit. Answer: a

  27. Which of the following structures is NOT part • of the pistil? • ovule • ovary • style • anther • stigma Answer: d

  28. Angiosperms (flowering plants) have wide distribution in the biosphere and the largest number of species in the plant kingdom. (a) Discuss the function of FOUR structures for reproduction found in angiosperms and the adaptive (evolutionary) significance of each. (b) Mosses (Bryophytes) have not achieved the widespread terrestrial success of angiosperms. Discuss how the anatomy and reproductive strategies of mosses limit their distribution. (c) Explain alternation of generations in either angiosperms or mosses. 2005

  29. (Carpel)

  30. Incomplete Flower Imperfect Flower Complete Flower Perfect Flower

  31. Monoecious Plant

  32. Microspores

  33. Egg Sac

  34. Monocot Germination

  35. Dicot Germination

  36. Tissue culture

  37. Vegetative Reproduction= Clones

  38. Which is true of seeds? • They contain the gametophyte. • They are characteristic of all plants. • They contain the cotyledon. • They are a mechanism for pollen dispersal. • They are not characteristic of conifers. Answer: c

  39. Which of the following structures is NOT part • of the pistil? • ovule • ovary • style • stigma • anther Answer: e

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