But let a few million years go by and those single cells got very interesting.

Every single cell in your body can be replaced within six months!

They did come in, and it took seven of them to get me down to a single cell.

Scores of such plates were needed for a single cell.

But the construction cost of a single secure cell is close to $100,000.

Their torture was to spend three days without food and water in a single cell.

We said, let us test a sample of any kind, even just a single cell, and we'd love to talk more.

Had he taken only a single cell from each, many more embryos would have been needed.

I think that not a single cell stood empty for more than an hour or two.

The rod at the base of the picture is one single cell.