Osmosis Direction in Root Hair Cells

Steps:

• Identify the root hair cell interior as region 1, where solutes create lower water concentration.
• Recognize the cell membrane as the partially permeable barrier, labeled 3.
• Note the surrounding soil water as region 4, with higher water concentration due to dilution.
• Confirm osmosis drives water from high (4) to low (1) concentration across membrane 3.

Why B is correct:

• Osmosis definition: water moves from higher to lower water concentration across a partially permeable membrane, matching soil (4) to cell (1) via membrane (3).

Why the others are wrong:

• A reverses concentrations, ignoring solute buildup inside the cell.
• C lacks a complete option, providing no valid regions.
• D duplicates B but is listed separately; B is the confirmed correct choice.

Final answer: B