Answer:
Cellular specialisation is the process by which an initial undifferentiated cell, gets specialized (attains a structure and function characteristic of a given cell type). In this case, the embryonic stem cells, undergo specialisation to give the many different cells and tissues of the body. Without cellular specialisation during embryo development, we wouldnt have all these varying tissue types fine-tuned to their functions.
Yes and to add to that it also is divided into many specialized field which then cover their morphology