The statement that is most impractical and unlikely to be informed by taxonomy is:
Watching species as they evolve in real time gives us the opportunity to name and classify new organisms as speciation occurs.
This statement implies that taxonomy is primarily focused on the immediate naming and classification of species as they evolve, which is not the main role of taxonomy. Instead, taxonomy traditionally relies on the study of species that have already been observed and described over time, rather than real-time observation of speciation. The other statements highlight practical applications of taxonomy related to understanding ecosystems, addressing global challenges, and tracing evolutionary histories.