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Unformatted text preview: 1. Which of the following are the water-conducting cells of xylem, have thick walls, and are dead at functional maturity? C) tracheids and vessel elements 2. For this pair of items, choose the option that best describes their relationship. (A) The number of cells within the embryo sac (B) The number of nuclei within the embryo sac B) Item (A) is less than item (B). 3. A soil well suited for the growth of most plants would have all of the following properties except E) a high pH. 4. Which of the following arise from lateral meristem activity? A) secondary xylem 5. Which soil mineral is most likely leached away during a hard rain? D) NO 3- 6. The value for Ψ in root tissue was found to be -0.15 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (Ψ = -0.23), net water flow would A) be from the tissue into the sucrose solution. 7. Which of the following is true in plants? A) Mitosis occurs in gametophytes to produce gametes. B) Meiosis occurs in sporophytes to produce spores. C) The gametophyte is within the flower in angiosperms. D) A and B only E) A, B, and C 8. What is the role of proton pumps in root hair cells? B) acquire minerals from the soil 9. Gas exchange, necessary for photosynthesis, can occur most easily in which leaf tissue? C) spongy mesophyll 10. In plant roots, the Casparian strip is correctly described by which of the following? D) It ensures that all water and dissolved substances must pass through a cell membrane before entering the stele. 11. Which of the following types of plants is not able to self-pollinate? A) dioecious 12. Some plants extract and concentrate heavy metals from the soil. A current use for such plants is E) photoremediation of polluted sites. 13. All of the following cell types are correctly matched with their functions except A) companion cell - formation of secondary xylem and phloem. 14. What are the three main elements on which plant growth and development depend? C) oxygen; carbon; hydrogen 15. Which of the following is the correct sequence of events in a pollen sac? E) microsporocyte – meiosis - microspores – mitosis - two haploid cells per pollen grain 16. What is the main cause of guttation in plants? A) root pressure 17. The vascular system of a three-year-old eudicot stem consists of E) 3 rings of xylem and 1 of phloem. 18. Transpiration in plants requires all of the following except D) active transport through xylem cells. 19. Three mitotic divisions within the female gametophyte of the megaspore produce A) three antipodal cells, two polar nuclei, one egg, and two synergids. 20. Iron deficiency is often indicated by yellowing in newly formed leaves. This suggests that iron A) is a relatively immobile nutrient in plants....
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This document was uploaded on 10/13/2009.
- Spring '09