What is the primary purpose of mitosis in living organisms?

The primary purpose of mitosis in living organisms is cell division for growth and repair. During mitosis, a single cell divides to produce two identical daughter cells, ensuring that each new cell has a complete set of chromosomes. This process is essential for various functions within an organism, such as increasing the number of cells for growth, replacing damaged or dead cells, and maintaining the overall health of tissues.

This process is fundamentally different from the production of gametes, which is a function of meiosis, not mitosis. Additionally, while genetic uniqueness is a characteristic of gametes produced through meiosis, mitosis typically results in genetically identical daughter cells. Therefore, options related to generating genetically unique cells and photosynthesis do not pertain to the function of mitosis.