Cell division is crucial for several reasons in organisms. Firstly, it allows for the repair of dead or damaged cells, which is essential for maintaining healthy tissues and organs. When cells are injured or die, new cells must be produced to replace them, ensuring that the organism can continue to function properly. Secondly, cell division is vital for the regeneration of new body parts in certain organisms, such as lizards that can regrow their tails. This ability to regenerate is a form of asexual reproduction and is important for survival in some species. Lastly, cell division is necessary for growth into an adult stage, as it enables organisms to increase in size and develop from a juvenile to a mature form. Overall, cell division plays a fundamental role in growth, repair, and regeneration in living organisms.