Question

Cell wall of plant cell consists of two regions - primary a
wall and secondary cell wall. Cells of which plant tissue
have only primary cell wall?​

Answer 1

Answer:

Plant cell walls are usually divided in textbooks into two categories: primary walls that surround growing cells or cells capable of growth and secondary walls that are thickened structures containing lignin and surrounding specialized cells such as vessel elements or fiber cells.

Answer 2

• 1. A non-living rigid structure called cell wall present outside the plasma membrane of plant and fungal cell.
• 2. Algae have a cell wall made of cellulose, galactans, mannans and minerals like calcium carbonate.
• 3. Plant cell wall consists of cellulose, hemicelluloses, pectins and proteins.
• 4. The cell wall of young plant is called primary cell wall.
• 5. On maturity secondary cell wall formed inner to it.
• 6. The middle lamella is a layer of calcium pectate which holds or glues the neighboring cells.
• 7. The cell wall and middle lamella may traversed by plasmodesmata; the cytoplasmic connection between two adjacent cell.