Question

Which of the following is true for a plant that is wilting?

A. Root hair cells will have a positive pressure potential.
B. The pressure potential in endodermal cells will be positive.
C. Mesophyll cells will have a positive pressure potential.
D. The pressure potential in guard cells will be high to keep them closed.
C. The pressure potential in the xylem will be more negative than in a turgid plant.

Answer 1

The pressure potential in the xylem will be more negative than in a turgid plant. Correct option is C.

Step-by-step explanation:

The correct answer is C. The pressure potential in the xylem will be more negative than in a turgid plant. The pressure potential, also known as turgor potential, is the pressure exerted by the cell contents against the cell wall. In a wilting plant, the pressure potential in the xylem, which is responsible for transporting water and nutrients from the roots to the rest of the plant, will be more negative compared to a turgid (rigid and fully hydrated) plant. This decrease in pressure potential is due to a decrease in water availability and uptake in the roots.