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Pre-Test
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1
Most of the force on water that causes upward movement in plants comes from
A)osmosis.
B)evaporation.
C)root absorption.
D)active transport.
E)Herkimer's forces.
2
Water potential is the
A)combination of turgor pressure and pressure potential.
B)difference between pressure potential and osmotic potential.
C)combination of pressure potential and solute potential.
D)product of pressure potential and osmotic potential.
E)difference between pressure potential and solute potential.
3
In the absence of transpiration, water moves into and up xylem because of
A)root pressure.
B)turgor pressure.
C)evaporation.
D)high soil mineral concentration.
E)guttation.
4
High root pressure can cause water to be lost by the leaves through the process of
A)respiration.
B)regurgitation.
C)transpiration.
D)guttation.
E)translocation
5
Outward bulging of guard cells with increased turgor pressure occurs because of
A)differences of wall thickness.
B)wilting of the adjacent epidermal cells.
C)contractions of the cytoskeleton.
D)swelling of chloroplasts.
E)accumulation of starch grains.





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