Assertion: primary cell wall | /r/HasProperty | flexible layer
Facets:
Source sentences:
text: Plant cells have a primary cell wall, which is a flexible layer formed on the outside of a growing plant cell, and a secondary cell wall, a tough, thick layer formed inside the primary plant cell wall when the cell is mature.
text: The primary cell wall develops when the cell grows, so it tends to be thin and flexible.
text: In a plant cell, there will a primary cell wall – the flexible layer on the outer side of a developing plant cell and a secondary cell wall – the tougher and the thicker layer on the inner side.