Question

What is a cell theory ​

Answer 1

They theory that all living things are made out of cells.

that's cells are the smallest building block of life.

That cells must be created by pre-existing cells.

Answer 2

In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells