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A classification system for living and extinct organisms.
Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and
Biology deals with the study of the many varieties of living organisms.
Martian geological features, such as the "Face on Mars", sometimes trigger facial pareidol
Leukemia. A blood smear from a patient suffering from leukemia demonstrates the abundance of enlarge
The injector on-time is called the pulse width.