The increase in girth associated with production of wood and bark in trees occurs as a consequence of

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Quizplus · Accepted Answer

Secondary growth is responsible for the increase in girth in trees. This occurs due to the activity of lateral meristems, specifically the vascular cambium and cork cambium, which produce new layers of secondary xylem (wood) and secondary phloem (bark) respectively. Primary growth occurs at the tips of roots and shoots and results in the elongation of these structures, while apical meristem growth refers specifically to the activity of the apical meristems at the tips of roots and shoots. Indeterminate growth refers to the ability of some plants to continue growing throughout their lives, but does not specifically refer to the increase in girth associated with secondary growth.

The Increase in Girth Associated with Production of Wood and Bark