This is an example of mutual dependence between species.

Woman and man were made for each other; but their mutual dependence is not the same.

In either case there is a mutual dependence of parts.

The relationship between cup holders and the fast-food industry is one of mutual dependence.

There had been a mutual dependence that was ended forever.

This alliance was rooted in their mutual dependence upon each other.

In smaller groups male lions are thought to share a "mutual dependence".

In a way, it has to be put down to mutual dependence.

But there remains a mutual dependence that most republics seem likely to have to recognize.

All that we've ever had was our mutual dependence on each other for survival.