Question

Pith is not well developed in
A.Monocot stem
B.Monocot root
C.Dicot stem
D.Dicot root

Answer 1

Hint: Pith is a persistent middle strand of spongy tissue in the stems of most vascular plants that has storage function.

Complete answer:
Pith is a tissue in the stems of vascular plants. It is made out of delicate, springy parenchyma cells, which store and transport supplements all through the plant. In dicots, it is situated in the middle of the stem. In monocots, it expands likewise into blossoming stems and roots. The pith is surrounded by a ring of xylem. The xylem is circled by a ring of phloem. It is very much evolved in monocot stem, monocot root and dicot stem. Pith is missing in established dicot roots.
Thus, option (D) is correct; Dicot root
Additional Information: Medullary rays are pieces of parenchyma present between vascular groups of dicot stem. They separate phloem and xylem bundles. They fill in as a connection among pith and cortex. They are otherwise called vascular rays and pith rays. They perform different functions like food stockpiling, stockpiling of tannins, transport of food and water, exchange of gases and so on.

Hence the correct answer is OPTION(D)

Note: A large number of adjusted, rounded, parenchymatous cells with enormous intercellular spaces which involve in the middle of the stem comprise the pith. The segment of pith taken as an explant contains parenchymatous cells (i.e., basic perpetual tissue which have lost the ability to divide). At the point when such cells are refined on strong culture media, the parenchymatous cells of pith become meristematic and begin dividing, bringing about a mass of undifferentiated cells called callus.