Chapter 26 - Chapter 26 Secondary Growth in Stems...

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Chapter 26: Secondary Growth in Stems Multiple-Choice Questions 1. Introduction; p. 580; moderate; ans: d Which of the following statements about secondary growth is FALSE? a. It results from the activity of the vascular cambium and the cork cambium. b. It is responsible for the increase in girth of a plant. c. It can occur simultaneously with primary growth. d. Most monocots exhibit considerable secondary growth. e. Herbaceous plants undergo little or no secondary growth. 2. Annuals, Biennials, and Perennials; p. 581; moderate; ans: c Which of the following statements about woody perennials is FALSE? a. Some form dormant rhizomes or bulbs during unfavorable seasons. b. They include trees and shrubs. c. Some flower before they become adult plants. d. Some are deciduous. e. Some live for many years. 3. The Vascular Cambium; p. 581; easy; ans: d The cells that comprise the vascular cambium are the ___________ and the ______________: a. axial rays; vascular rays b. axial rays; fusiform initials c. vascular rays; fusiform initials d. fusiform initials; ray initials e. vascular rays; ray initials 4. The Vascular Cambium; p. 581; moderate; ans: e Cambial initials produce ______ cells toward the outside and ______ cells toward the inside. a. ray; phloem b. phloem; phloem c. xylem; xylem d. xylem; ray e. phloem; xylem 5. The Vascular Cambium; p. 582; moderate; ans: d In secondary tissues, the axial system consists of ______ cells and the radial system consists of ______ cells. a. parenchyma; phloem b. parenchyma; xylem c. xylem; phloem d. xylem and phloem; ray e. ray; xylem and phloem
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2 Chapter 26 Secondary Growth in Stems 6. The Vascular Cambium; p. 582; moderate; ans: b Which of the following statements about vascular rays is FALSE? a. They are composed largely of parenchyma cells. b. They serve as barriers to the movement of food substances and water. c. They store starch, proteins, and lipids. d. They synthesize secondary products. e. They are variable in length. 7. The Vascular Cambium; p. 582; moderate; ans: b As the vascular cambium continues to divide, the cambail cells: a. are displaced inward. b. are displaced outward. c. remain in their original location. d. cease to divide periclinally. e. cease to divide anticlinally. 8. Effect of Secondary Growth on the Primary Body of the Stem; p. 583; moderate; ans: e Which of the following statements about secondary growth is FALSE? a. The secondary vascular tissues form a cylindrical shape. b. Vascular rays extend radially through the secondary xylem and secondary phloem. c. Primary phloem fibers remain intact longer than other primary phloem cells. d. The primary phloem is pushed outward. e. Most plants produce more secondary phloem than secondary xylem. 9. Effect of Secondary Growth on the Primary Body of the Stem; pp. 583–584; moderate; ans: d Secondary growth in the Tilia stem is different from that in the Sambucus stem because in the Tilia stem: a. more secondary xylem than secondary phloem is formed.
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  • Fall '12
  • Fertuck
  • phloem, Plant anatomy, secondary growth, Vascular cambium, secondary xylem

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