The Pleiades is an open star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology. The Pleiades is a white star cluster that is roughly 500 light years from Earth.
Blue Blood Origin. The term blue blood originated in Spain. It was used to differentiate between people with light skin from those with darker complexions. The veins of southern Europeans appeared more blue due to their pale and translucent skin. Wealthy landowners or their descendents were part of an upper class in Spain that were called blue-bloods or blue-blooded.
Blood groups are inherited from both parents. The ABO blood type is controlled by a single gene (the ABO gene) with three types of alleles inferred from classical genetics: i, IA, and IB. The gene encodes a glycosyltransferase âthat is, an enzyme that modifies the carbohydrate content of the red blood cell antigens.he ABO blood group system is widely credited to have been discovered by the Austrian scientist Karl Landsteiner, who identified the O, A, and B blood types in 1900. Landsteiner originally described the O blood type as type C, and in parts of Europe it is rendered as 0 (zero), signifying the lack of A or B antigen.