Q. Which of the following is true?
A) Vessels are unicellular and with narrow lumen
B) Vessels are multicellular and with wide lumen
C) Tracheids are unicellular and with wide lumen
D) Tracheids are multicellular and with narrow lumen
Explanation
Vessels or tracheae are made up of a row of cells placed one above the other with their intervening walls absent or variously poured. These have wide lumen for conduction of minerals and water. While tracheids are unicellular and have a narrow lumen.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.