The association is able to continue because photobiont cells reproduce faster than they are destroyed.

The cells reproduce themselves many times in this environment and take several weeks to grow to the point where they can be returned for reimplantation.

He had jiggered them so the individual cells reproduced at an incredible rate.

All cells reproduce by splitting into two, both halves getting a full set of genes.

The tiny cells can reproduce themselves perfectly in a healthy body.

Most people's cells reproduce ok too, for at least most of their lives.

Normal healthy cells only reproduce when there is enough space for them.

This stops the affected cells to reproduce or spread to other parts of the body.

These cells can reproduce themselves in the laboratory, perhaps indefinitely.

For example, in one species 25-35 cells reproduce, 8 asexually and around 15-25 sexually.