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Why is osmosis key to root pressure?
Because osmosis is just another word for water pressure.
Because it decides which water molecules go in and out of roots.
Because osmotic pressure dictates transpiration.
Because water moves into the root system when the concentration of water in the soil is higher than inside the root cells.
Answers (1)
The non-osmotic active absorption of water from the soil by the root hair cells and then movement of water to the xylem elements generates a hydrostatic pressure. This pressure is called the root pressure. It is the result of expenditure of energy to create high osmotic pressure in the root hair cells as well as in the xylem elements so that water can follow the concentration gradient. Hence, the correct answer is option d.
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