The region of a plant stem in which cells divide to increase its diameter is? By: Sunday|Published on: Dec 23|Categories: Biology WAEC| 0 comments A. cambium B. phloem C. xylem D. collenchyma Correct Answer: Option A – cambium Users Also Read These:In plant cells the role of the membrane is played by the?Which of these organelles is common to both plant…The structure found only in the plant cells are?The removal of all the phloem tissues of the stem of…Which ONE is not an adaptation for water…SEE ALSO In humans, which of the following pairs of hormones correspond to male and female respectively?