Internal. The ultimate sources of variation, the source of new heritable characteristics in populations and species, are due to mutation and recombination in chromosomes, genes, DNA.
Zone VE is the flood insurance rate zone that corresponds to coastal areas that have additional hazards associated with storm waves. Mandatory flood insurance requirements apply. Zone X and Zone X-500 are flood insurance rate zones that are outside the flood plain or with average flood depths of less than 1 foot.
No distinctions are made between the different flood hazard zones that may be included within the SFHA. 100IC. 100-year Flood Discharge Contained in Channel. An area where the 100-year flooding is contained within the channel banks and the channel is too narrow to show to scale.