classification, ssigning objects to some pre-existing classes or categories., genus, a rank used to group closely related species, binomial-nomenclature, two terms are used to denote a species of living organism, taxonomy, the science of classifying living and extinct organisms into groups based on shared characteristics., species, multiple types of animal groups, prokaryote, a single-celled organism that lacks a nucleus and other membrane-bound organelles., eukaryote, an organism whose cells contain a nucleus and other membrane-bound organelles., unicellular, consisting of a single cell., multicellular, a organsim with multiple cells, six kingdom system, The six-kingdom system of classification divides all living organisms into six major groups, hetrtotroph, A heterotroph is an organism that cannot produce its own food and must obtain nutrition by consuming other organic matter.

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