34. Vascular Plant Transport

What keeps the force of gravity from overcoming transpirational pull?

Which of the cells below are involved with bulk flow?

The water potential of a cell is defined by the equation Ψ = Ψ_S + Ψ_P. Which of the following statements is true?

Which of the following conditions will result in the fastest transport through the xylem in a tree, assuming adequate water supply in the roots?

The cytoplasmic continuum connecting neighboring cells is called the __________.

When referring to phloem transport, what creates the sink in roots?

The rate of transpiration is expected to be greatest on a __________ day.

Normally, when an aphid feeds by puncturing plant tissues, it does not have to suck the sap out. If an aphid, however, inserted its feeding tube in the wrong place, the fluid in the aphid's guts could be sucked out through the feeding tube. What could explain this phenomenon?

The last thing all water and solute molecules pass through before they enter the vascular system of roots and move upward to the leaves is __________.

What process contributes directly to the turgor pressure that opens and closes stomata?

In an apple tree that is producing sugars, sugar might flow from __________ to __________.

Which of the following describes how some plants are adapted to arid environments?

During winter, tree sap can sometimes freeze, and cavitation (the formation of an air pocket) may occur. Which of the following mechanisms of sap transport would you expect to be most immediately affected by cavitation?

The proton pump in plant cells __________.

A plant cell placed in a solution with a higher water potential will __________.