IB Biology SL 3.2.7 Water Transport in Plants Question Bank

a. water is lost through the stomata/leaves by evaporation;

b. water is drawn out of xylem vessels / spongy mesophyll into leaf airspaces;

c. adhesion allows water to travel through cell walls (by capillary action) / against gravity;

d. this generates tension/pulling force/negative pressure potentials inside the xylem vessels;

e. tension/transpirational pull draws water up in the xylem;

f. cohesion ensures a continuous column of water in the xylem/OWTTE;

g. concentration gradient created in roots allowing water intake by osmosis (from soil)

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