Question

Find the correct pathway of movement of water in given presentation of cells.

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

The measure of the relative tendency of water to move from one area to another is water potential. Water moves from high water potential to low water potential.

${\psi }_w={\psi }_s+{\psi }_p$
${\psi }_w$ of X cell=$-10+5=-5$ bar
${\psi }_w$ of Y cell =$-15+10=-5$ bar
${\psi }_w$of Z cell =$-7+1=-6$ bar

X and Y cells have equal water potential. So, there is no net movement of water between them. Z cell has the lowest water potential, so water moves from X and Y to Z.