Question

if all organisms are composed of cells then, which set on organisms are considered cells?

Answer 1

Explanation:

cell theory: The scientific theory that all living organisms are made of cells as the smallest functional unit.

Answer 2

Answer:

A living things, whether it is made up of one single cell ( like bacteria) or many cell like ( like an human) is called an organisms.

Thus the cell is building blocks of of all organism.