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Solve this:

Q7. The direction of the water flow in given cells X, Y & Z can be presented as

(1) X $\to $ Y $\leftarrow $ Z

(2) X $\to $ Y$\to $ Z

(3) X $\leftarrow $ Y$\leftarrow $ Z

(4) X $\leftarrow $Y$\to $ Z

The correct option is (3) - The movement of water takes place from cell Z to Y and from Y to X :

As the movement of water takes place from lower DPD to higher DPD and it is calculated by the following formula -

DPD = OP(Ψs) - TP

So, For cell X, DPD = -30 -10 = -40

For cell Y, DPD = -50 -20 = -70

For cell Z, DPD = -40 - 30 = -70

Although the DPD of cell Y and Z is equal but, the solute potential and turgor pressure of cell Z is higher than that of cell Y. So the movement of water will take place from lower concentration to the higher concentration of solutes.

Regards.

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