When potassium ion is transported into guard cells, water: a) enters by osmosis. b) is actively transported out of the cells. c) moves to the edge of the cell. d) leaves by osmosis. e) is actively transported into the cells.
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_____ is responsible for the movement of sugars from leaves to taproots; _____ is responsible for the movements of sugar from taproots to leaves. a) Bulk flow … bulk flow b) Bulk flow … root pressure c) Root pressure … bulk flow d) Bulk flow … transpiration e) Transpiration … transpiration
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In a sugar sink, such as a taproot, sugar is converted into _____. a) glycogen b) cellulose c) fatty acids d) starch e) proteins
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At a sugar sink, sugar is removed from phloem by _____. a) osmosis b) root pressure c) active transport d) diffusion e) transpiration
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Water moves into phloem by _____. a) osmosis b) endocytosis c) root pressure d) active transport e) transpiration
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The water pressure that pushes water and sugar from sugar source to sugar sink is referred to as _____. a) translocation b) transpiration c) bulk flow d) solute pressure e) root pressure
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Sugar moves from leaves into the _____ of _____ by _____. a) sieve-tube members … xylem … active transport b) tracheids … phloem … diffusion c) tracheids … phloem … active transport d) sieve-tube members … phloem … active transport e) sieve-tube members … phloem … diffusion
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_____ transport(s) sugars from leaves to, for example, taproots. a) Blood vessels b) Tracheids c) Vessel elements d) Xylem e) Phloem
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Which of these processes is responsible for leaves being considered sugar sources? a) catabolism b) Krebs cycle c) photosynthesis d) citric acid cycle e) glycolysis
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Tree roots are a ________ of sugars in spring and a ________ in the fall. a) source; source b) sink; sink c) sink; source d) source; sink
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BNO Team