For now, even with all that is known about genes and cells, deep mysteries remain.

By learning about cells and how they function, you can learn about all types of living things.

Why we talk about cells will become apparent as we progress.

Tell us the fact about cells you find most impressive.

It's already sparked off comments about students and grey cells.

So she got a notebook, a dictionary and a science book and began teaching herself about cells, one word at a time.

I had to ask myself why she would have needed to be told before doing anything about terrorist cells inside the United States.

This answer presumes some basic vocabulary about molecules and cells.

But doctors talk about cells as if they had such unlimited importance all by themselves.

By August, the farmers began talking about the graves and cells on the base, prompting an investigation.