Question

How do the water enters through the root hair ?

Answer 1

• Water enters root hair cells by osmosis.
• The root hair cell is hypertonic to the surrounding soil water. This means that it has a lower water molecule concentration.
• Water then moves from cell to cell through the root cortex by osmosis along a concentration gradient; this means that each cell is hypertonic to the one before it.
• In the centre of the root the water enters the xylem vessels.
• Water may move by diffusion through the cell walls and intercellular spaces.