Cells know how to differentiate through a process called gene expression. It’s a specific combination of genes that are turned on and off.
Do u have choices? if one of the choices are 92 thats correct
AIDS attacks white blood cells, damaging the immune system and making the infected individual more susceptible to illness. White blood cells are the ones that fight off harmful bacteria, so without them you could even end up in the hospital or die from a common cold.
I'm pretty sure it would be;
-breaking down living and dead plant material