Some metropolitan areas contain metropolitan divisions. Two metropolitan divisions exist within the DallasâFort WorthâArlington MSA. The term metropolitan division is used to refer to a county or group of counties within a metropolitan area that has a population core of at least 2.5 million.
The bees carry the propolis back to their hives and mix it with their salivary secretions and wax flakes. Propolis contains 55% resins and balsams, 30% beeswax, 10% etheric oils, and 5% pollen.
Both Apis cerana and Apis mellifera build multiple combs arranged parallel to one another. However, Apis cerana does not use propolis, a glue-like material, to seal cracks and holes in their hives, as does Apis mellifera. Behaviorally, Apis cerana is almost indistinguishable from Apis mellifera.