(N/A) To distinguish between a monocot and a dicot stem,observe the arrangement and structure of the vascular bundles:
$1$. Dicot Stem:
- Vascular bundles are conjoint,collateral,and open (possess cambium).
- They are arranged in a distinct ring.
- The ground tissue is well-differentiated into hypodermis,cortex,endodermis,pericycle,and a central pith.
$2$. Monocot Stem:
- Vascular bundles are conjoint,collateral,and closed (lack cambium).
- They are scattered throughout the ground tissue.
- Each vascular bundle is surrounded by a sclerenchymatous bundle sheath.
- Phloem parenchyma is absent,and water-containing cavities are often present within the bundles.