BIO question?

Four of the five answers below are related to investigations into evolutionary evidence from comparative biochemistry. Select the exception.





a. neutral mutations





b. homologous structures





c. molecular clock





d. protein comparisons





e. DNA-DNA hybridizations

BIO question?
They are all used for comparative evidence of evolution all looking back towards a common ancestor.





here is a link about molecular clock





http://en.wikipedia.org/wiki/Molecular_c...
Reply:molecular clock