AP BIOLOGY

Detailed explanation-1: -Pith is the spongy tissue in the center of stems, also made up of parenchyma cells. Both the pith and medullary rays mainly function as storage tissues, though the medullary rays also transport materials from the vascular bundles to the pith for storage.

Detailed explanation-2: -Cortex. The cortex is a ground tissue region found in dicot stems, located between the outer epidermis and the inner vascular structures. It is primarily composed of parenchyma cells, and it may contain sclerenchyma and collenchyma cells in dicot stems.

Detailed explanation-3: -Parenchyma. Parenchyma is a versatile ground tissue that generally constitutes the “filler” tissue in soft parts of plants. It forms, among other things, the cortex (outer region) and pith (central region) of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds.

Detailed explanation-4: -A dicot stem generally has vascular bundles arranged into a ring and a pith (ground tissue at the center). Conversely, the monocot stem consists of vascular bundles scattered throughout the ground tissues and does not have a discernible pith.

Detailed explanation-5: -The innermost region of the plant stem consists of a spongy tissue called pith. The pith is composed of parenchyma cells. The main function of the pith is to store essential nutrients like water and sugars.