Chapter 18 - Chapter 18 Gymnosperms Multiple-Choice...

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Chapter 18: Gymnosperms Multiple-Choice Questions 1. Evolution of the Seed; p. 408; easy; ans: a A seed is composed of a(n) ______ and ______. a. ovule; embryo b. ovule; megasporangium c. ovule; integuments d. megasporangium; embryo e. megasporangium; integuments 2. Evolution of the Seed; p. 410; moderate; ans: d In seed plants, the ______ is called the nucellus. a. young sporophyte b. megagametophyte c. megaspore d. megasporangium e. embryo 3. Evolution of the Seed; p. 410; moderate; ans: b Which of the following was NOT a step in the evolution of the ovule? a. Retention of the megaspores in the megasporangium b. Production of only four megaspore mother cells per megasporangium c. Formation of a highly reduced endosporic megagametophyte d. Production of only one functional megaspore per megasporangium e. Development of the embryo within the megagametophyte 4. Evolution of the Seed; p. 410; easy; ans: d A micropyle is a(n): a. nutritive structure of the embryo. b. nutritive structure of the pollen grain. c. opening in the megaspore wall. d. opening in an integument. e. opening in the megasporangium wall. 5. Evolution of the Seed; p. 410; moderate; ans: e With the evolution of the ovule, the unit of dispersal shifted from the megaspore to the: a. sperm. b. egg. c. microspore. d. megaspore mother cell. e. seed.
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2 Chapter 18 Gymnosperms 6. Evolution of the Seed; p. 410; moderate; ans: e The fossil record indicates that the integument evolved through a gradual: a. thickening of the megasporangium wall. b. splitting of the megaspore wall. c. fusion of megaspore lobes. d. splitting of the ovule wall. e. fusion of integumentary lobes. 7. Evolution of the Seed; p. 410; moderate; ans: c Just before fertilization, a gymnosperm ovule contains: a. an embryo. b. antheridia. c. archegonia. d. megaspores. e. a seed coat. 8. Evolution of the Seed; p. 411; moderate; ans: c Seed plants evolved most directly from: a. lycophytes. b. ferns. c. progymnosperms. d. angiosperms. e. trimerophytes. 9. Progymnosperms; p. 411; difficult; ans: c The progymnosperms had characteristics intermediate between those of the ______ and those of the ______. a. Paleozoic ferns; gymnosperms b. Paleozoic ferns; angiosperms c. seedless vascular trimerophytes; seed plants d. seedless vascular trimerophytes; modern ferns e. seedless vascular trimerophytes; rhyniophytes 10. Progymnosperms; p. 412; difficult; ans: d Which of the following questions concerning the progymnosperms is FALSE? a. They had a bifacial vascular cambium. b. Archaeopteris was a major type. c. Some contain a eustele. d. Most were heterosporous. e. Seed plants are thought to have evolved from plants similar to the progymnosperms.
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Chapter 18 Gymnosperms 3 11. Extinct Gymnosperms; p. 412; moderate; ans: c Which extinct gymnosperms resembled modern cycads? a. Seed ferns b. Cordaitales c. Bennettitales d. Ophioglossales e. Trimerophytes 12. Living Gymnosperms; pp. 413–414; moderate; ans: d Which of the following statements about gymnosperms is FALSE?
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