This means that a biological unit (traits etc.) should be related to a cultural unit.

But the biological unit appears to function as I direct.

"This Spock is also one of your biological units, Creator?"

But you were created by a biological unit.

Actually, we biological units are well known for our unreliability.

The cell is the basic structural, functional and biological unit of all known living organisms.

A homotetrameric biological unit is composed of beta barrels with the active site at one end.

Marlowe was Gregory's stage name, and he only had one biological unit that called itself his father.

In this theory, the family is viewed as the central "biological unit of human society" from which all else develops.

And also it is related to biological unit.