Dear student,
Multicellular organism have complex body structure due to which they have division of labour. Therefore to perform every function efficiently with less chances of error. Muticellular organism have different methods of division for increasing the number of cell and reproduction. Mitosis is necessary increasing number of cell and meiosis is necessary for reproduction in multicellular organism. Unicellular organism are single celled so its easy to divide into two half and that is the cell division and reproduction both. Therefore division in multicellular organism is different from unicellular organism.
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