Q. Passage cells are thin walled cells found in
A) phloem elements that serve as entry points for substance for transport to other plant parts
B) testa of seeds to enable emergence of growing embryonic axis during seed germination
C) central region of style through which the pollen tube grows towards the ovary
D) endodermis of roots facilitating rapid transport of water from cortex to pericycle
Explanation
[Solution from source] In older roots most endodermal cells become thickened with suberin, but some opposite the protoxylem stay thin-walled; these passage cells let water pass from the cortex into the pericycle and xylem. They are not part of phloem, seed coat or style. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.