Answer:
role in embryonic growth
depends on a process called cell determination, in which initially identical cells become committed to different pathways of development. A fundamental part of cell determination is the ability of cells to detect different chemicals within different regions of the embryo.
The process in which a previously undifferentiated cell is already programmed to become a specific cell type by following a specified path towards cell differentiation. Cell determination is influenced by the action of the extracellular environment and the contents of the cell's genome.