Most things do not evolve, even biological ones, over short periods of time.

That allowed the case to be argued on technical issues, separating legal definitions from biological ones.

Clearly there are environmental factors, and probably some biological ones, at work.

Some people may argue that other questions should precede the biological ones.

He said the plant had never been used for any prohibited weapons, including biological or chemical ones.

This example shows that environmental factors cannot be cleanly isolated from biological ones.

"They can treat the psychological problems while a physician prescribes medication for the biological ones."

Stalin, having caught up with the United States in nuclear weapons, had decided he was ready to return to biological ones.

The availability of these things will affect the cost benefits of the body deploying its own biological ones.

The adoptive parents did not know the identities of the biological ones.