First slide

Plant-Water Relations

Question

There are three cells. Cell P has water potential of -20 atm, water potential of cell Q is -18 atm and the water potential of cell R is -18 atm. The direction of water flow is:

Easy

A

P→Q→R
B

Q→P→R
C

Q→P←R
D

R→Q←P

Solution

Water flows from region of higher water potential to a region of lower water potential. Therefore, water flows from cell R to cell P and water will also flow from cell Q to cell P.

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