1 A) Nitrogen B) Nickel C) Aluminum D) Lead 2 A) Leaching zone, living organisms and humus, weathered rock, subsoil B) Humus, weathered rock, leaching zone C) Weathered rock, subsoil, topsoil D) Topsoil, subsoil, weathered rock 3 A) silt B) sand C) clay 4 A) microorganisms B) earthworms C) small plants D) insects 5 A) Iron B) Potassium C) Carbon D) Calcium 6 A) tracheid. B) sieve-tube element. C) root hair. D) stoma. 7 A) transpiration B) erosion C) guttation D) girdling 8 A) cohesion-tension B) endosymbiotic C) fluid mosaic D) pressure flow 9 A) Companion cells and collenchyma B) Vessel elements and tracheids C) Seive tube members and companion cells D) Cork and palisade parenchymal cells 10 A) gap junctions B) adhesion junctions C) strands of cytoplasma within plasmodesmata D) lignin within the cell walls 11 A) calcium B) fluorine C) potassium D) chlorine 12 A) nitrogen compounds; carbohydrates B) carbohydrates; nitrogen compounds C) oxygen; carbon dioxide D) potassium; hydrogen ions 13 A) xylem B) phloem C) the casparian strip 14 A) obtain their organic compounds from aerobic respiration B) are parasitic, deriving their carbohydrates from other plants and/or fungi C) do not require organic compounds to maintain life. D) capture their energy from the sun and reduce carbon dioxide 15 A) movement of organic materials in phloem B) movement of H2O in xylem C) movement of minerals in xylem 16 A) sieve tubes B) vessel elements C) tracheids D) stomates 17 A) It occurs at a slow pace. B) It can only be effective at reaching contaminants at the root level. C) It is expensive and requires excessive energy to accomplish. D) Plants vary in their ability to remove pollutants from the environment. 18 A) canola B) poplars C) mustard plants D) wheat 19 A) The direction of flow is from the source to the sink. B) The buildup of water creates a positive pressure that accounts for flow of phloem contents. C) Transpiration exerts a pulling force that moves the phloem contents. D) Sugar is actively transported into the phloem, followed by osmosis of water. 20 A) Cohesion and adhesion B) Surface tension and high specific heat C) The ability to maintain temperature and nonpolarity of its molecules
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