This is a less preferred form of foundation for Utilihab use but does allow for its use with some alternative materials, such as stacked stone, soil-cement, clay block, and compressed earth block.
Gametic isolation refers to a set of circumstances whereby gametes are isolated or separated from their matches by a medium or distance. This description also refers indirectly to reproductive isolation, in which a gamete cannot interact with the gametes of another species.
A postzygotic reproductive barrier is a mechanism that reduces the viability or reproductive capacity of hybrid offspring. Spatial isolation is a type of prezygotic barrier in which different species are reproductively isolated by location.