In plant anatomy, the pith (or medulla) is the central ground tissue composed of parenchyma cells that serve functions such as nutrient storage and transport. The presence of a "wide" or "well-developed" pith is a key distinguishing feature for specific plant organs. In dicot stem,the vascular bundles are arranged in a ring, leaving a large, distinct central space occupied by a well-developed pith. However, unlike dicot roots, monocot roots typically have a large and well-developed pith in the center of the vascular cylinder.
A. dicot stems and monocot stems: While dicot stems have a well-developed pith, monocot stems typically do not have a discernible pith region because their vascular bundles are scattered throughout the ground tissue.
C. dicot roots and monocot roots: While monocot roots have a large pith, dicot roots generally have a very small, inconspicuous pith or lack one entirely as the center is often occupied by xylem.
D. dicot roots and monocot stems: In this pair, both typically lack a wide pith. Dicot roots have a reduced or absent pith, and monocot stems have scattered bundles without a distinct central pith.
There is an explanation video available below.
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