AP BIOLOGY

Detailed explanation-1: -The lateral meristem tissues are responsible for the secondary growth of plants. The secondary growth of plants increase in stem thickness and it is due to the activity of the lateral meristems, which are absent in herbs or herbaceous plants.

Detailed explanation-2: -At the level of intrafascicular cambium, undergo dedifferentiation and by divisions and revisions form interfascicular cambium. Both intrafascicular and interfascicular cambium join to form a continuous ring of vascular cambium known as secondary meristem. It gives rise to the secondary xylem and secondary phloem.

Detailed explanation-3: -Secondary growth, or “wood”, is noticeable in woody plants; it occurs in some dicots, but occurs very rarely in monocots. Figure 30.4. 1: Primary and secondary growth: In woody plants, primary growth is followed by secondary growth, which allows the plant stem to increase in thickness or girth.

Detailed explanation-4: -Secondary tissues are produced in woody plants. Secondary xylem and secondary phloem are produced from a cylinder of meristematic tissue within the woody stems and roots. This cylinder of meristematic tissue is the vascular cambium.

Detailed explanation-5: -Secondary growth occurs at the lateral meristems. The cells at the meristems undergo cellular division, where each cell multiplies into two daughter cells and add to the cellular material collectively called tissue. Secondary growth in plants produces secondary phloem and xylem.