The Pacific Time Zone observes standard time by subtracting eight hours from Coordinated Universal Time (UTCâ8). The standard time in this zone is based on the mean solar time of the 120th meridian west of the Greenwich Observatory.he Pacific Time Zone observes standard time by subtracting eight hours from Coordinated Universal Time (UTCâ8). The standard time in this zone is based on the mean solar time of the 120th meridian west of the Greenwich Observatory.
What does viability mean in Agriculture Dictionary?: the power of a cell, organism, spore, seed or any other living thing to endure and carry on its life processes. Home Tools
1 Viability selection, the selection of individual organisms who can survive until they are able to reproduce. 2  Fetal viability, the ability of a fetus to survive outside of the uterus.  Genetic viability, chance of a population of plants or animals to avoid the problems of inbreeding.