Q. Companion cells are closely associated with
A) Guard cells
B) Sieve elements
C) Vessel elements
D) Trichomes
Explanation
[Solution from source] Companion cells are connected to sieve tube elements by pit fields and help maintain their pressure gradient. Guard cells surround stomata, and vessel elements belong to xylem. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.