All cells have a cell membrane, but not all cells have a nucleus. Only eukaryotic cells (animal cells, plant cells, fungi....) have a nucleus. Prokaryotic cells, such as a bacteria cell, don't have a...
It is still considered as a cell. Take the red blood cellas an example, when it matures, it looses its nucleus but even then, it is still considered as a cell.
i dont think its possible for a cell not to have a nucleus because without the nucleus the cell cant do any of the functions it needs to do to survive Correction - A cell without a nucleus is called...