Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

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What is the correct sequence of taxonomic ranks from broadest to most specific?

Kingdom, Phylum, Class, Order, Family, Genus, Species
Species, Genus, Family, Order, Class, Phylum, Kingdom
Class, Order, Family, Phylum, Kingdom, Species, Genus
Phylum, Class, Order, Kingdom, Family, Species, Genus

The correct answer is: Kingdom, Phylum, Class, Order, Family, Genus, Species

The correct sequence of taxonomic ranks from broadest to most specific is Kingdom, Phylum, Class, Order, Family, Genus, Species. In this hierarchy, each rank represents a level of classification that categorizes organisms based on shared characteristics. The broadest category is the Kingdom, which groups together all living organisms into larger categories based on significant traits. As you move down the ranks, the groups become more specific. Phylum divides the kingdoms into smaller groups based on body plans and organizational structure. Class further divides phyla into groups that share even more specific characteristics. Order, Family, Genus, and Species continue this trend of refinement, with Species being the most specific classification, referring to individual organisms that can reproduce together. Understanding this hierarchy is essential because it reflects the evolutionary relationships among organisms, helping scientists communicate about different forms of life accurately.