"How do you define, in biological terms, who is black?"

The success of an individual in biological terms depends on his ability to leave successful descendants.

But in biological terms the drive for more is essential.

In biological terms they aren't, or you could all go home.

A bicycle's performance, in both biological and mechanical terms, is extraordinarily efficient.

What we're looking at today is 200 years of change, very recent in biological terms.

I will try to answer this in biological terms.

In biological terms, "vegetable" designates members of the plant kingdom.

Maybe a better way to look at it is in biological terms.

"Neotony" was a biological term related to a prolonged period of childhood.