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Mitosis.
growth
Organisms grow by cell division or mitosis which causes increase in number of cells , and then by increase in size of cell .
Multicellular
Tissue describes a group of similar cells.
development
Mitosis.
growth
Organisms grow by cell division or mitosis which causes increase in number of cells , and then by increase in size of cell .
Multicellular.
Multicellular.
Human, animal
Multicellular.
Tissue system
Multicellular
They can grow by increasing their cytoplasm(to a certain point) They can grow by dividing and increasing the number of cells. And depending on your definition of grow, a multicellular organism could grow by increase the amount of interstitial fluid.
The Old Cells Die And A Number Of News Cells Are replaces by them.