Q. The …A… cells are specialised parenchymatous cells, which are closely associated with sieve tube elements. The sieve tube elements and …B… cell are connected by pit fields presents between their common …C… walls. Choose the correct combination of A, B and C from the options given below
A) A–companion, B–companion, C–longitudinal
B) A–vessels, B–companion, C–longitudinal
C) A–tracheid, B–companion, C–lateral
D) A–companion, B–companion, C–lateral
Explanation
The companion cells are present in association with the sieve tube elements with the help of pit fields present between their walls. The companion cells help in maintaining pressure gradient is sieve tubes
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.