What is the process of change observed in embryonic cells according to their specific functions called?

Cork,secondary cortex and secondary xylem are formed through:

Changes that take place in cells on the basis of specific functions are called...

Through which process do tissues, organs, and organ systems form from the new cells generated by the zygote?

In a developing embryo,analyse the consequences if cell divisions are not followed by cell differentiation.

Living differentiated cells, that by now have lost the capacity to divide, can regain the capacity of division under certain conditions. This phenomenon is termed as $.........$.