Which scientist developed a taxonomic system and binomial nomenclature still used today?

• A. Linnaeus
• B. Fleming
• C. Ehrlich
• D. Pasteur

Answer: (A)

The main idea being tested is who established a universal way to name and organize living organisms. Carolus Linnaeus created the hierarchical classification system and, crucially, introduced binomial nomenclature in the 18th century, grouping organisms into ranks like genus and species. The two-part Latin names (genus first, species second) are still the standard for naming species today, providing a consistent, language-independent method for scientists worldwide. This enduring framework underpins modern taxonomy, even as we add updates like domains and phylogenetic relationships. While Fleming, Ehrlich, and Pasteur made landmark contributions to microbiology, they did not establish the long-lasting naming system Linnaeus did.