<P> In cell biology , the nucleus ( pl . nuclei ; from Latin nucleus or nuculeus , meaning kernel or seed ) is a membrane - enclosed organelle found in eukaryotic cells . Eukaryotes usually have a single nucleus , but a few cell types , such as mammalian red blood cells , have no nuclei , and a few others have many . </P>
<P> In cell biology , the nucleus ( pl . nuclei ; from Latin nucleus or nuculeus , meaning kernel or seed ) is a membrane - enclosed organelle found in eukaryotic cells . Eukaryotes usually have a single nucleus , but a few cell types , such as mammalian red blood cells , have no nuclei , and a few others have many . </P>
a cell that has a nucleus is called
a cell that has a nucleus is called
eukaryotic cells
eukaryotic cells