The term biogenesis refers to the production of life from already-living matter or organisms. This is in contrast to abiogenesis, which refers to the production of life from non-living matter. Natural abiogenesis has never been observed, nor are there any generally accepted models for how it could occur. Biogenesis, on the other hand, is routinely observed at all levels of life. When a bacteria divides, a plant produces seeds, or a mammal gives birth, biogenesis is occurring.
