Zonation (Ecol.). An arrangement of different plant communities
in more or less definite zone, following one another in a
constant order due to a continuous change in the habitat
factors. Zone (Ecol.). (a) One of the belts occupied by
successive communities in a Zonation, (b) Soil See under Soil
horizons. Zone of Saturation (Ped.). The zone occupied by the
ground water in the soil. See Water Table. Zygote (Genet.). The
cell formed by the sexual fusion of two Gametes. also the
organism developing from such a cell BCFT..