Question

Water will move from the base hair through the cortex if the water potentials are_____________.
A. Root hair is $0$, Cortex is $0$, Xylem is $0$
B. Root hair is -2, Cortex is $ - 1$, Xylem is $0$
C. Root hair is $0$, Cortex is $ - 1$, Xylem is $ - 2$
D. Root hair is $0$, Cortex is $ + 1$, Xylem is $ + 2$

Answer 1

Hint: In general, the water movement within the plants takes place with the assistance of osmosis. It's also said that this process plays an important role within the movement of liquids and minerals amid the cells and various compartments within plants. Typically, we will say that water molecules move from the base cells towards the leaves by means of the Xylem, and therefore the food moves from these leaves to the opposite parts of the plant body with the assistance of the matter.

Complete answer:
Water potential may be a measurement of the P.E. in water, specifically water movement between two systems.
Suppose a difference in water potential exists between the two regions. In This case, water's spontaneous movement will occur, as long as the water's action can occur between them.
The direction of water flow is going to be energetically downhill, i.e., from the region of upper water potential (root hair) to the world of lower water potential (Xylem) through the cortex from less harmful water potential ($ - 1$kPa) to more negative water potential ($ - 2$kPa).
So, the correct answer is “Option C”.

Additional Information:
Water potential is the combination of solute concentration (s) and pressure(p).
Water potential will decrease by adding more solutes, and water potential will increase by removing solutes.
Water potential increases by the addition of pressure, and water potential decrease by removal of pressure.

Note:
As we already know that water molecules flow from a neighbourhood of high-water potential to an area of low tide potential continuously until it maintains the equilibrium of the system's water potential. At equilibrium, the electric water potential is zero, i.e., there's no difference in water potential on either side of the system. The direction of water flow is going to be energetically downhill, i.e., now, from the world of upper water potential (that is root hair) to the world of lower water potential (that is Xylem) through the cortex from less harmful water potential ($ - 1$kPa) to more negative water potential ($ - 2$kPa).