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D both a and b e both a and c reset selection mark

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D. Both a and b E. Both a and c Reset Selection Mark for Review What's This? Question 6 of 11 4.0 Points Ionized auxin exits the cytosol A. through the proton pump. B. via passive diffusion. C. through specialized carriers located at the basal end of each cell. D. through gravitropism.
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5/29/13 8:53 PM 2013 Plant Biology Lectures 8-10 Problem Set 8 Page 3 of 11 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment E. None of the above Reset Selection Mark for Review What's This? Question 7 of 11 4.0 Points Which of the following statements about auxin transport is false? A. Auxin enters a cell by passive diffusion of its anionic form. B. The transport of auxin in a plant is polar—from apex to base. C. Auxin anion transporters that mediate the transport of auxin out of cells are located mainly in the basal end of cells. D. The plasma membrane proton pump helps to drive auxin transport. E. Reagents that make membranes permeable to H+ would inhibit auxin transport. Reset Selection Mark for Review What's This? Question 8 of 11 4.0 Points What is the major reason why some fruits are packaged in bags made of a plastic that is permeable to gases? A. To speed the ripening of the fruit B. To allow auxin to escape C. To allow methyl jasmonate to escape D. To allow oxygen to enter the bag E. To allow ethylene to escape F. none of the above Reset Selection Mark for Review What's This? Question 9 of 11 4.0 Points Adding acid to the cell wall of a plant will _______ its pH and most likely _______. A. increase; cause the cell to expand. B. increase; block auxin-induced cell expansion. C. decrease; cause the cell to expand. D. decrease; block auxin-induced cell expansion. E. decrease; cause gibberellins to increase in concentration.
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5/29/13 8:53 PM 2013 Plant Biology Lectures 8-10 Problem Set 8 Page 4 of 11 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Question 10 of 11 4.0 Points Seed dormancy affords adaptive advantages. Which of the following features would not be adaptive for the germination of seeds of a desert annual that grows in warm, disturbed areas and requires deeply buried seeds? A. Large seeds B. Seeds requiring a short period of imbibition C. Seeds requiring abrasion of the seed coat D. Prolonged exposure of the seeds to cold temperatures E. Seeds with water-soluble chemical inhibitors that need to be leached by water Reset Selection Mark for Review What's This? Question 11 of 11 4.0 Points A plant’s bushiness is promoted by a _______ ratio. A. high auxin-to-gibberellin B. low auxin-to-gibberellin C. high auxin-to-cytokinin D. low auxin-to-cytokinin E. high gibberellin-to-cytokinin Reset Selection Mark for Review What's This?
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D Both a and b E Both a and c Reset Selection Mark for...

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