Even if only simple cells lived on that world, they had been beavering away for a long time to good purpose.

Neither simple nor complex cells were believed to display end-stopping.

The closest thing that nature has to a nanofoundry is the simple biological cell.

By concentrating sunlight current systems can get better efficiency than simple solar cells.

Food was a serious problem on land, but we learned to cultivate simple cells and feed on them.

And yeasts are easy to study because they are such simple cells.

So we can learn a lot about complicated organisms from studying very simple cells like yeast.

A human mind's really just a web of simple neuronal cells wired together in a particular way.

The cave has a porch with simple cells on both ends.

The simple electrical cells were first developed in 1800s.