He was a biological link in the submarine's machine, the best man for this job.

The biological links between alcohol and violence are, however, complex.

It's a simple matter to unseal the files and confirm the biological link.

Last week, the journal Science reported the first biological link to lung cancer.

There are no consistent or pervasive biological links to dysthymia.

Intelligence and social inequality: Why the biological link?

The associative nodes serve as a biological link of information about other people with a particular familiar face (to the patient).

Symmetry and beauty have a strong biological link that influences aesthetic preferences.

The strength of the male instinct was proof of this biological link.

But biological links can cause problems as well, especially if the grandchildren's parents have had a turbulent marriage or a particularly upsetting divorce.