Question 11
Support and MovementThe xylem elements perform the function of transport but they also help to support plants because they
- A.are internally located
- B.are tubular
- C.have rigid thick walls
- D.constantly absorb water
Show the answer and explanation
Answer: C (have rigid thick walls)
Explanation
Xylem vessels have thick walls strengthened with lignin, which makes them rigid and able to hold the plant up.