Q. Tracheids
A) Are the dominant cell types of xylem in angiosperms
B) Are primarily found in mosses and liverworts
C) Are responsible for water conduction and support in many land plants
D) First appeared during Palaeozoic era
Explanation
Tracheids are elongated and their cell walls are usually extensively thickened by deposition of lignin. Water flows from one tracheid to another through unthickened regions (pits) in the cell walls.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.