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
Viability refers to a point in fetal development at which the fetus may survive outside the womb. The lower limit of viability is approximately five months gestational age and is usually later. There is no sharp limit of development, age, or weight at which a fetus automatically becomes viable. According to data from 2003â05, survival rates are 20 to 35 percent for babies born at 23 weeks of gestation; 50 to 70 percent at 24 to 25 weeks; and over 90 percent at 26 to 27 weeks.