Question

1. compare and contrast the organization of primary tissues in young roots of eudicots and monocots.

2. compare and contrast the organization of primary tissues in young stems of eudicots and monocots.

Answer 1

Monocot	Dicot
Polyarch xylem is present.	Tetrarch xylem is present.
Cambium is absent	Cambium is present as the secondary meristem
More number of phloem strips are present	Limited number of phloem is present.
Conjunctive tissue is sclerenchymatous in Maize	Conjunctive tissue is parenchymatous
Pith is poorly developed	It contains well-developed large pith
Passage cells are absent	Passage cells are present opposite to the protoxylem point.

Monocot Stems	Dicot Stems
They have scattered bundles	They have bundle arranged in the form of a ring.
Numerous vascular bundles	Four to eight vascular bundles
Does not contain Sclerenchymatous bundle cap	Vascular bundles contain a sclerenchymatous bundle cap.
Two metaxylem elements per vascular bundle	Many metaxylem elements are present
medullary rays are absent	Medullary rays are present
Pericycle is absent	Pericycle is present
Ground tissue is undifferentiated	Ground tissue is differentiated into steler and extra- steler tissue.
Trichomes are absent	Trichomes are present