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Simple organisms may be unicellular, consisting of just one cell, while more complex organisms are multicellular. There are two types of cell division. Mitosis is used for growth and repair and produces diploid cells identical to each other and the parent cell. Meiosis is used for sexual reproduction and produces haploid cells different to each other and the parent cell. Unicellular vs multicellular An ameoba, a simple unicellular organism
Cell division is a continuous process that must occur for an organism to function, whether for growth, repair or reproduction. During cell division stages, it is the chromosome that is responsible for the replication and distribution of DNA amongst new cells.Strangely enough, the functions of chromosomes in plant cells are the same as the function of chromosomes in animal cells.ell division is a continuous process that must occur for an organism to function, whether for growth, repair or reproduction. During cell division stages, it is the chromosome that is responsible for the replication and distribution of DNA amongst new cells.