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Hmm, pluricellular organism is an odd term. For organisms with more than once cell, I have always seen 'multicellular' instead. The general answer is the same for all kinds of cells: the two new progeny cells must be integrated into the organism. When a cell divides, most often its parent cell was a relatively undifferentiated stem cell or pluripotent cell capable of turning into a limited number of different kinds of cells. When it divides, one of the progeny becomes a differentiated or mature kind of cell (like a blood cell, or a liver cell) which has a distinct role in the organism. The other progeny cell becomes another stem cell to replace its parent. Was that what you had in mind?
identical to the parent cell (generally identical, since alterations in genetic material can occur, more or less organelles may be distributed between the daughter cells, etc.) Mitosis is fundamental for asexual reproduction of eukaryotes, for the embryonic development, for the growth of pluricellular beings and for tissue renewal.
Thanks. @blues You've given an accurate answer. That's precisely what I was looking for