Living organisms exist in various systems of balanced symbiotic relationships.

In most cases, the organisms already exist in the contaminated soil or ground water.

The organism can only exist in an atmosphere with a high gaseous-oxygen content.

So far, artificial organisms exist only as relatively simple programs that are in little danger of being confused with the real thing.

The environment is the entire constellation of stimuli in which an organism exists.

We'll find that the answer drops out once we have understood why organisms exist anyway.

Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits.

Perhaps long extinct, but living organisms once existed on Mercury!

If such organisms exist, they would be eliminated from the analysis and ignored.

This organism exists in a filamentous form with one flagella per cell.