Yes, more than one nucleolus can be present in a cell. The number of nucleoli in a cell varies depending on the species and the stage of the cell cycle.

Here's why:

* Nucleoli are sites of ribosome synthesis. Ribosomes are essential for protein synthesis, and a cell's demand for ribosomes can fluctuate.

* Multiple nucleoli can increase ribosome production. This is especially important during periods of high protein synthesis, such as during growth and development.

* The number of nucleoli can also vary depending on the cell type. For example, cells that produce a lot of proteins, like neurons, may have more nucleoli than cells that produce fewer proteins.

In summary:

* Multiple nucleoli are common and indicate high levels of ribosome production.

* The number of nucleoli can vary based on species, cell type, and stage of the cell cycle.