How does the molecular clock work? It analyzes the brain functionality of two different species. It examines and compares the physical characteristics of two different species. It illustrates relationships between two different species. It compares the number of mutations that exist in the DNA of two different species.
a molecular clock is a figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged. That is all i know sorry