Well, through the theory of evolution, all lifeforms have evolved from a single cellular common ancestor. I'm not sure if certain um [reproductive substances?] are single cellular, but I assume that each creature on the planet has to have developed from dividing cells.
Two cells are result from one cell division.
mutation
Two daughter Cells are the result of mitotic Cell division.
Yes, both cell division and cell enlargement result in growth.
mutation
Good
zygotes
carcinogens
One daughter cell with double the DNA of parent cell
If the daughter cell is a result of mitotic cell division, then yes.
Multiplication of somatic cells
Mitosis or cell division?