AP BIOLOGY

Detailed explanation-1: -In the dicot stem, the vascular bundles are arranged in a ring, with pith concentrated at the core of the stem, rather than being scattered throughout the plant interior. In dicot stem wedgw shaped, definite and arranged in one or two rings. Vascular bundles are conjoint, collateral and open.

Detailed explanation-2: -In dicot stems, the vascular bundles are arranged in a ring. Like dicot roots, dicot stems are protected by an outer layer of dermal tissue called the epidermis.

Detailed explanation-3: -Monocot stems have scattered vascular bundles. Dicot stems have their vascular bundles in a ring arrangement.

Detailed explanation-4: -Monocotyledons other than Poaceae also have vascular bundles scattered or in rings near the periphery, as seen in stem transections.

Detailed explanation-5: -The vascular bundles in the stems of most of dicots are conjoint, collateral and open.