The combination of pressure potential and solute potential is
water potential
transpiration potential
stem potential
Which of the following will cause the stomata to close?
wilting
increase in carbon dioxide concentration
darkness
__________ is a waste product from the liver.
Thyroxine
Ammonia
Urea
None
Water potential is the
combination of turgor pressure and pressure potential
difference between pressure potential and osmotic potential
combination of pressure potential and solute potential
product of pressure potential and osmotic potential
Stomata close when the guard cells:
gain chloride ions.
become turgid.
In most species, as K+ moves in or out of the guard cell to regulate the stomatal opening, there is movement in the opposite direction by
Na+
OH-
Cl-
About _______________ % of the water taken in by roots is lost by transpiration.
100
In the absence of transpiration water moves into and up the xylem because of
root pressure
turgor pressure
evaporation
high soil mineral concentration
Guttation is:
movement of soluble organic materials through plants
movement of water through the apoplast.
evidence of root pressure.
negative pressure created by transpiration.
The reason that a column of water in a tall tree does not sink because of its weight is
the formation of hydrogen bonds with the plants vessels
bubbles form that are too large to be transported
the presence of strong ion concentrations near the top of the tree
