Imagine that all have a continuous covering of a proliferating epithelium.
This process is the primitive streak, and it is formed, like the sickle, of proliferating epiblast cells.
Epithelial cancer of the cervix may assume a proliferating ulcerative type, forming the well-known “cauliflower” excrescence.
They are going to have to move fast, for threats are proliferating fast as well.
Young 1-nucleate individual emerged from cyst, destined to grow, proliferating its nuclei to adult form.