Chapter 20 - Chapter 20 Evolution of the Angiosperms...

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Chapter 20: Evolution of the Angiosperms Multiple-Choice Questions 1. Introduction; p. 453; moderate; ans: d Angiosperms first appear in the fossil record in the ______ period. a. Devonian b. Carboniferous c. Triassic d. Cretaceous e. Tertiary 2. Relationships of the Angiosperms; p. 453; moderate; ans: d Recent evidence supports the hypothesis that the seed plants most closely related to angiosperms are the: a. Bennettitales and Ginkgo . b. gnetophytes and Ginkgo . c. lycophytes and gnetophytes. d. Bennettitales and gnetophytes. e. Bennettitales and lycophytes. 3. Origin and Diversification of the Angiosperms; p. 453; moderate; ans: b Which of the following is NOT a unique characteristic of the angiosperms? a. Double fertilization producing endosperm b. Stamens with four pairs of pollen sacs c. A three-nucleate microgametophyte d. An eight-nucleate megagametophyte e. Phloem having sieve tubes and companion cells 4. Origin and Diversification of the Angiosperms; p. 453; moderate; ans: e The earliest known fossils of angiosperms are approximately ______ years old. a. 13,000 b. 130,000 c. 1.3 million d. 13 million e. 130 million 5. Origin and Diversification of the Angiosperms; p. 454; easy; ans: a The monocots and eudicots comprise approximately _____ percent of living angiosperms. a. 97 b. 63 c. 50 d. 10 e. 3
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2 Chapter 20 Evolution of the Angiosperms 6. Origin and Diversification of the Angiosperms; p. 454; moderate; ans: a Triaperturate pollen is characteristic of: a. eudicots. b. dicots. c. monocots. d. magnoliids. e. gymnosperms. 7. Origin and Diversification of the Angiosperms; p. 454; difficult; ans: e ______ have single-pored pollen. a. Only eudicots b. Only monocots c. Only magnoliids d. Both eudicots and monocots e. Both magnoliids and monocots 8. Origin and Diversification of the Angiosperms; p. 455; easy; ans: c Which plants are characterized by oil cells containing ethereal oils? a. Eudicots only b. Monocots only c. Magnoliids only d. Eudicots and monocots e. Magnoliids and monocots 9. Origin and Diversification of the Angiosperms; p. 456; moderate; ans: c Which of the following is NOT a characteristic of Archaefructus ? a. Seeds enclosed in carpels b. Stamens c. Petals d. Dissected leaves e. An aquatic habitat 10. Origin and Diversification of the Angiosperms; p. 456; difficult; ans: d The original angiosperms most likely: a. had large flowers. b. had complex pollination systems. c. were terrestrial. d. had simple flowers. e. had few stamens.
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Chapter 20 Evolution of the Angiosperms 3 11. Evolution of the Flower; p. 457; moderate; ans: a In most angiosperms, petals are probably evolutionary derivatives of: a. stamens. b. sepals. c. carpels. d. receptacles. e. peduncles. 12. Evolution of the Flower; p. 457; moderate; ans: a Petals and stamens are similar in that both are supplied by: a. a single vascular strand. b. two vascular strands. c. three vascular strands. d. four vascular strands.
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