where do all cells come from and how do they reproduce

All cells come from pre-existing cells through a process called cell division. Cells reproduce by dividing to form two new cells called daughter cells. In unicellular organisms, this division results in two separate organisms through a type of asexual reproduction known as binary fission. In multicellular organisms, cell division allows the organism to grow, replace damaged or worn- out cells, and sometimes produce specialized sex cells called gametes through meiosis. There are two main types of cell division: mitosis and meiosis. Mitosis produces two genetically identical daughter cells and is used for growth and repair. Meiosis produces gametes (sex cells) with half the genetic material, enabling sexual reproduction when gametes fuse during fertilization. DNA within each cell is duplicated before division to ensure that each daughter cell inherits the same genetic information. This duplication and division process is tightly regulated and essential for life. The origin of the very first cell is believed to stem from self-replicating RNA enclosed in a phospholipid membrane, allowing it to reproduce and evolve further.