Many types of epithelial cells perform the function of . Many types of epithelial cells perform the function of . support secretion conduction contraction

secretion

Explanation:

Epithelial cells are usually cells located or found outside the body, skin, urinary tract, vessels, cavities, and organs of the body, and have special modifications of their surfaces which depends upon the specific roles they perform and where they are found. However, many types of epithelial cells perform a common function of secretion. Epithelial cells are closely packed together.

from the original order (top to bottom) the new order will go

1 (founder)

4 (hawk)

2 (mutate)

3 (next generation)

the cell cycle is the final answer! : )