Which of the following is responsible for the increase in girth (width)of trees?

Question

Quizplus · Accepted Answer

Secondary growth, which occurs in the lateral meristems, is responsible for the increase in girth (width) of trees. This involves the production of secondary xylem and phloem tissues, which accumulate over time and cause the trunk and branches of the tree to thicken. Primary growth (option A) is responsible for the lengthening of the stem or root, while growth in apical meristems (option C) is a part of primary growth. The increase in the width of vessel elements (option D) does contribute to the growth of the xylem tissue, but this is a result of secondary growth rather than a cause of it.

Which of the Following Is Responsible for the Increase in Girth