What are the structural characteristics of $(a)$ Meristematic cells near the root tip and $(b)$ The cells in the elongation zone of the root?

(N/A) The meristematic cells near the root tip are characterized by:
- Rich protoplasm.
- Large,conspicuous nucleus.
- Thin,primary cellulosic cell walls.
- Fewer and smaller vacuoles.
- High metabolic activity with a greater number of mitochondria.
- Numerous plasmodesmata for intercellular communication.
$(b)$ The cells in the elongation zone of the root are characterized by:
- Increased vacuolation,which helps in cell enlargement.
- Significant increase in cell size and dimensions.
- Deposition of new cell wall materials to support the expanded cell structure.