Explain why evolutionary biologists monitor selec - tively neutral polymorphisms as molecular clocks.

Because of their property of preciseness and rhythmic repetitions like a normal clock sequence ...

Explanation:

Evolutionary biologist use these neutral polymorphisms as molecular clock because of their gradual accumulation of mutations that remain on changing gradually in a uniform sequence overlarge number of generations. These changing sequences are highly precise over and over, that's why these are also termed as neutral mutations.