Budding is a type of asexual reproduction. An new organism is formed by the protrusion of part of another organism; this is very common in plants, but may be found in animal organisms as well. Usually, the protrusion stays attached to the primary organism for a while, before becoming free. The new organism is naturally genetically identical to the primary one.
In agriculture, budding is also a process that consist of ingrafting the bud of a plant into another plant. This is particularly made for fruit tree (see fruit tree propagation).
The term budding is also applied to the process of embryonic differentiation in which new structures are formed by outgrowth from preexisting parts.
When yeast buds, one cell becomes two cells. This is an example of reproduction.