How do monocot and dicot stems differ in their anatomical structure?

The anatomical structure of monocot and dicot stems shows several distinct differences:

• Vascular Bundles: In dicot stems, the vascular bundles are arranged in a ring, whereas in monocot stems, the vascular bundles are scattered throughout the ground tissue.
• Presence of Cambium: Dicot stems usually have a cambium, which is a layer of meristematic tissue that allows for secondary growth (increase in girth). Monocot stems generally lack cambium and therefore do not exhibit secondary growth.
• Ground Tissue: In dicot stems, the ground tissue is differentiated into cortex and pith. In monocot stems, the ground tissue is not differentiated into cortex and pith.
• Vascular Bundle Structure: In dicot stems, the vascular bundles are open (having cambium) and are conjoint and collateral. In monocot stems, the vascular bundles are closed (lacking cambium) and are conjoint and collateral.