BSC2011 Exam 2 - Fall 2009 Version A Supplemental...

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Fall 2009 Version A Supplemental Instruction: BSC 2011 Exam 2 1) Which of the following "vegetables" is botanically a fruit? A) potato B) lettuce C) radish D) celery E) green beans 2) Currently available transgenic plants have been modified for all of the following traits except A) insect resistance. B) nitrogen fixation. C) herbicide resistance. D) improved nutritional quality. E) virus resistance. 3) Heartwood and sapwood consist of A) bark. B) periderm. C) secondary xylem. D) secondary phloem. E) cork. 4) Which of the following is not part of the transpiration-cohesion-tension mechanism for the ascent of xylem sap? A) loss of water from the mesophyll cells, which initiates a pull of water molecules from neighboring cells B) transfer of transpirational pull from one water molecule to the next, owing to cohesion by hydrogen bonds C) hydrophilic walls of tracheids and vessels that help maintain the column of water against gravity D) active pumping of water into the xylem of roots E) lowering of water potential in the surface film of mesophyll cells due to transpiration 5) If you were to prune the shoot tips of a plant, what would be the effect on the plant and the leaf area index? A) bushier plant, lower leaf area index B) tall plant, lower leaf area index C) tall plant, higher leaf area index D) short plant, lower leaf area index E) bushier plant, higher leaf area indexes 6) Axillary buds A) are initiated by the cork cambium. B) develop from meristematic cells left by the apical meristem. C) are composed of a series of internodes lacking nodes. D) grow immediately into shoot branches. E) do not form a vascular connection with the primary shoot. 7) Which structure is incorrectly paired with its tissue system? A) root hair-dermal tissue B) palisade parenchyma-ground tissue C) guard cell-dermal tissue D) companion cell-ground tissue E) tracheid-vascular tissue 8) Stomata open when guard cells A) sense an increase in CO2 in the air spaces of the leaf. B) open because of a decrease in turgor pressure. C) become more turgid because of an addition of K+, followed by the osmotic entry of water. D) close aquaporins, preventing uptake of water. E) accumulate water by active transport. 9) The operation of the sodium-potassium pump moves A) sodium and potassium ions into the cell. B) sodium and potassium ions out of the cell. C) sodium ions into the cell and potassium ions out of the cell.
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This note was uploaded on 03/30/2010 for the course BSC BSC2011 taught by Professor Evans during the Spring '10 term at École Normale Supérieure.

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BSC2011 Exam 2 - Fall 2009 Version A Supplemental...

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