That form of reproduction which requires but one parent, as in reproduction by fission or in the formation of buds, etc., which drop off and form new individuals; asexual reproduction.

asexual reproduction by the production and release of spores

Oneness of origin; esp. (Biol.), development of all beings in the universe from a single cell; -- opposed to polygenesis. Called also monism.

The direct development of an embryo, without metamorphosis, into an organism similar to the parent organism; -- opposed to metagenesis.

Unity of origin; development from a single source (e.g., of all languages from an original language).