The true statement regarding the taxonomic system is:
The current taxonomic system is based on the Linnaean classification system.
This system, developed by Carl Linnaeus in the 18th century, provides a framework for classifying and naming organisms based on shared characteristics. The other statements are incorrect. Charles Darwin contributed to the understanding of evolution and natural selection, but he did not create the taxonomic system. Not all past extinct species have been cataloged, and not all current living species have been fully cataloged either.