Phloem - SI Leader Anita Vijapura Spring 2010 BSC2011 03/04...

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SI Leader: Anita Vijapura Spring 2010 BSC2011 03/04 1 Transport through Xylem Water and minerals ascend from roots to shoots through the ________________. This is __________-distance transport of __________ sap. To move material upward, we can apply _______________ pressure from below or _______________ pressure from above. Plants lose a lot of water by ________________________. Unless this lost water is replaced by water transported up from _______________, the leaves will __________ and the plants will eventually _________. The upward flow of _______________ also brings _________________________ to the shoot system. Is sap pushed upward from the roots, or is it pulled upward by the leaves? 1) Pushing xylem sap via _________________________________ a. When? b. Why? c. How? d. Result: 2) Pulling xylem sap via ______________________________________________ mechanism A. ______________________ Pull I. Why? During photosynthesis, _________ enters the cell through stomata and water vapor diffuses from ____________ the leaf toward ____________. Explain. II. How?
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SI Leader: Anita Vijapura Spring 2010 BSC2011 03/04 2 III. Result: B. I. _______________________ of water makes it possible to pull a column of sap from above without the water molecules ___________________. How? II. ________________________ of water molecules to the hydrophilic walls of xylem cells aids in offsetting the downward pull of _______________. How?
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