In developmental biology, differentiation refers to the natural process through which a cell with less specificity matures to become more unique in form and function.
Due to their open-ended tips, which allow for continual development, plants are created in a modular manner, meaning that the construction is never finished.
The reason for this is that multiple meristems may be found in various parts of these plant bodies, each of which is capable of continuously dividing and producing new cells.
The same apical meristem gives rise to diverse cell types in maturity, such as xylem, phloem, etc., therefore differentiation is likewise open-ended in this regard. As a result, higher plants can grow and differentiate indefinitely and at any rate they choose, making both processes open.