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method or system for grouping different species of organisms.
an injection of a weakened or dead pathogen into the body to build up immunity against a disease...
is one-millionth of a metre or one-thousandth of a millimetre (0,001 mm). Its unit symbol in the...
Linnaeus' two-part name system; the first name of the organism is the genus to which it belongs...
involuntary muscle found in the walls of blood vessels, in digestive, respiratory, urinary and...