Question

The trunks of tree increase in girth because of mitotic activity in the
A. Vascular tissue
B. Epidermis
C. Meristematic tissue
D. Pith.

Answer 1

Hint: The cells of those tissues are commonly small and almost spherical. They have a dense cytoplasm and comparatively few small vacuoles (watery saclike enclosures). Some of those cells, referred to as initials, are rapid supply of recent cells and might undergo mitosis (cell separation) typically before differentiating into the unique cells required for that area of the plant body.

Complete answer:
To answer this question, first, we need to know about plant growth. Meristem is a place where cells are able to divide and develop in plants. Meristems are categorized with the aid of using their vicinity with inside the plant as apical (positioned at root and shoot tips), lateral (with inside the vascular and cork cambia), and intercalary (at internodes, or stem areas among the locations at which leaves attach, and leaf bases, mainly of positive monocotyledons—e.g., grasses). Apical meristems help in the development of the main plant body and are liable for the extension of the roots and shoots.

Now, let us find the solution from the option.
Vascular tissue consists of xylem and phloem which deliver the water and nutrients inside the plant body. Cells of xylem and phloem are everlasting, i.e they cannot divide and produce new cells. Epidermis is the outermost layer of the plant. Such cells do not have the potential to divide and form new cells. Meristematic tissue has a potential to divide and produce new cells. Growth within the tree is displayed via mitotic function in the secondary meristem or cambium. Cells produced with the aid of using cambium are introduced on each side. Cells that are present interiorly are differentiated into xylem and which are present exteriorly are differentiated into the phloem.
Pith is found in the stem of vascular plants. It consists of soft and spongy parenchyma cells. Parenchyma cells are everlasting cells and cannot divide and produce new cells.
Hence, the correct answer is option(C)

Note: Lateral meristems are referred to as secondary meristems due to the fact they may be liable for secondary development or growth in stem girth and thickness. Meristems shape anew from different cells in injured tissues and are liable for wound healing. Unlike maximum animals, plants keep growing all through their whole existence span due to the limitless separation of meristematic parts.