Question
Draw illustrations to bring out the anatomical difference between Monocot stem and dicot stem.

Answer

Differences between dicot and monocot stem are:
 
Monocot Stem
Dicot Stem
1
Internally, the stem is not differentiated into cortex, endodermis, etc.
Internally, the stem is differentiated into epidermis, cortex, endodermis, pericycle, stealer system and to pith.
2
Hypodermis is sclerenchymatous.
Hypodermis is collenchymatous.
3
Vascular bundles are scattered in the parenchymatous ground tissue.
Vascular bundles are arranged in a ring.
4
Medullary rays are absent.
Medullay rays occur in between vascular bundles.
5
Vascular bundles are surrounded by bundle sheath.
Vascular bundles are not surrounded by bundle sheath.
6
Secondary growth does not occur, since cambium is absent.
Secondary growth takes place due to the presence of cambium.

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