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 AE is the flood insurance rate zone that corresponds with flood depths greater than 3 feet. Mandatory flood insurance purchase requirements apply. Zone AH is the flood insurance rate zone that corresponds to areas of shallow flooding with average depths between 1 and 3 feet.
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.