Question

differentiate between primary and secondary cell wall

Answer 1

Characteristics	Primary cell wall	Secondary cell wall
Found	Found in all plant cells	Seen only in mature and non dividing cells
Position	Placed in the inner to middle lamellar region	Placed in inner to primary cell wall.
Nature	They are thin and are elastic	They are not elastic,. They are thick and rigid
Growth	The growth of the cell by the deposition of cellulose	Growth is seen by gradual accumulation of additional layers
Pits	No pits are present	Pits are found
Extra materials found	No extra materials are found	Lignin, suberin, cutin may be present
Cellulose quantity	Less cellulose quantity	High quantity of cellulose is present
Hydration	Hydration is more and can be up to 60 %	Hydration is less and is up to 30 %
Extensibility	Present	Absent
Arrangement of fibrils	Wavy and loose arrangement of fibrils	Are arranged closely, straight and parallel