Final answer:
Radioactive Dating is the method that does not provide biological evidence for the age of the Earth, as it is a geological method, unlike fossil evidence, molecular clocks, and comparative anatomy, which are biological.
Step-by-step explanation:
Among the options provided, Radioactive Dating does not offer biological evidence for the age of the Earth; it is a geological dating method. Radioactive dating measures the decay of isotopes within rocks and provides an approximate age in years (absolute dating). In contrast, fossil evidence, molecular clocks, and comparative anatomy provide biological evidence. Fossils show evolutionary changes and allow scientists to categorize when organisms lived. Molecular clocks use DNA sequences to estimate when species diverged from a common ancestor. Comparative anatomy demonstrates evolutionary relationships through physical features shared amongst different species.