AP BIOLOGY

Detailed explanation-1: -So, the correct option is ‘Ground tissue system’.

Detailed explanation-2: -Parenchyma makes up the chloroplast-laden mesophyll (internal layers) of leaves and the cortex (outer layers) and pith (innermost layers) of stems and roots; it also forms the soft tissues of fruits.

Detailed explanation-3: -spongy ground tissue called the pith. Surrounding the vascular bundles is a layer that varies in thickness in different species and is called the cortex. Surrounding this and comprising the exterior surface of the stem is a layer called the epidermis.

Detailed explanation-4: -Cortex region of the dicot stem comprises parenchyma, sclerenchyma, and collenchyma cells. It is a ground tissue region located between the epidermis and inner vascular structures of the stem. Pith region of the dicot stem is composed of soft, spongy parenchyma cells.