Question 20
Transport in PlantsThe force that holds water together in the form of a stream within the xylem tube is the
- A.cohesion of water molecules to one another by hydrogen bonds
- B.force of gravity attacting the water molecules through the hydrogen bonds
- C.attraction between the water and xylem osmotic force
- D.normal flow of water from the ground with the help of gravitational force.
Show the answer and explanation
Answer: A (cohesion of water molecules to one another by hydrogen bonds)
Explanation
Water molecules stick to each other by hydrogen bonds (cohesion), so the column in the xylem does not break as it is pulled up.