Lab #9 - Brenda Lubin Ms Stephenson Lab#9 Ap Biology The amount of water needed per day from plants for growth and maintenance of tissues is compared

Lab #9 - Brenda Lubin Ms Stephenson Lab#9 Ap Biology The...

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Brenda Lubin 12/13/16 Ms. Stephenson Ap Biology Lab#9 The amount of water needed per day from plants for growth and maintenance of tissues is compared with the amount that is lost through sweat and secretion is low. Transport of water from the roots in xylem is determined by differences in water potential. Minerals that are actively transferred to the root accumulate in the xylem to increase the concentration of the dissolved substance and reduce the water potential. Water moves by osmosis. Sweating begins the evaporation of water through the stomata. Aufwärtsübergangszug on the liquid in the causes of xylem form of stress in the xylem. Stress also contributes to the recovery potential of water in the xylem. This results in moving water from the soil of the root and xylem cortex. Materials: 0.1 mL pipette, plant cutting, ring stand, clamps, clear plastic tubing, petroleum jelly, fan, lamp, spray bottle, and plastic bag. Methods: 1. Place the tip of a 0.1 mL pipette in a 16 inch piece of clear plastic tubing. 2. Submerge the tubing and pipette in a shallow tray of water. Draw water through the tubing until all bubbles are eliminated. 3. Carefully cut your plant stem under water. No air bubbles must be introduced into the xylem. 4. While the plant and tubing are submerged, insert the freshly cut stem into the open end of the tubing.

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