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Question
Thickening of trunk in woody plants is due to
Thickening of trunk in woody plants is due to
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Solution
The correct option is A Cambium
Cambium is the layer of actively dividing cells between xylem and phloem tissues that is responsible for the secondary growth of stems and roots. The cambium produces new layers of phloem on the outside and of xylem on the inside, thus increasing the diameter of the stem. In woody plants, this process produces wood and shapes the plant into a tree with a thickened trunk. Apical and intercalary meristems involve in elongation of plants. Epidermis is the outermost layer of plants which does not cause thickening of the trunk. So, option A is correct.
Cambium is the layer of actively dividing cells between xylem and phloem tissues that is responsible for the secondary growth of stems and roots. The cambium produces new layers of phloem on the outside and of xylem on the inside, thus increasing the diameter of the stem. In woody plants, this process produces wood and shapes the plant into a tree with a thickened trunk. Apical and intercalary meristems involve in elongation of plants. Epidermis is the outermost layer of plants which does not cause thickening of the trunk. So, option A is correct.
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