Multiple choice

Which of the following is a cause of root pressure?

  1. Osmotic flow of water into the xylem

  2. Loss of water from the xylem

  3. Low water potential of leaves

  4. High water potential of leaves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Root pressure is caused by osmotic flow of water into the xylem. Active transport of minerals into the root xylem lowers water potential there, causing water to move osmotically from the soil into the xylem, creating positive hydrostatic pressure.

Keep practicing — related questions