You only need the English Proficient for international operations as it's an ICAO thing. Some countries, like France, check; others may not. Similar on the RRTO -- some countries, like Canada and the Bahamas don't require it, but others, like Turks & Caicos, do require it and do check it.
Apoptosis, or programmed cell death, is a naturally occurring process in the body. It involves a controlled sequence of steps in which cells signal self termination. Apoptosis works to keep the body's natural cell division process of mitosis in check.
Regulation. 1  Apoptosis (programmed cell death) is an essential mechanism that organisms use to remove unwanted cells to attain precise control of organ development and function. It is a form of individual cell suicide originally defined by a series of morphological changes in nuclear chromatin and cytoplasm [1] ; [2].