It is seen in multicellular organisms with relatively simple body design. In fragmentation, the body simply breaks into smaller pieces and these pieces grow and mature into new individuals. Eg. Spirogyra
- Higher multicellular organisms cannot simply grow by cell to cell division because they are not just a random collection of cells.
- In multicellular organisms, specialised cells are organised into tissues, tissues to organs, organs to organ systems and final into the organism.
- Also, different cells perform different functions .Therefore, we need more complex systems for reproduction in these organisms.