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blood that has no antibodies (blood group AB) and can receive any type of blood.
mostly columnar epithelium with cilia that line the nasal cavity, trachea, bronchi, fallopian...
a process of asexual reproduction in which one cell splits into two cells
the muscular tube of the mammalian digestive tract that links the mouth to the stomach.
those species that are found only in a particular area or region and nowhere else on Earth.