 Most eukaryotic cell types usually have a single nucleus , but some have no nuclei , while others have several . This can result from normal development , as in the maturation of mammalian red blood cells , or from faulty cell division . 
 Most eukaryotic cell types usually <a href='got' title='1'><mark>have</mark></a> a single nucleus , but some <a href='got' title='2'><mark>have</mark></a> no nuclei , while others <a href='got' title='3'><mark>have</mark></a> several . This can result from normal development , as in the maturation of mammalian red blood cells , or from faulty cell division . 
Most eukaryotic cell types usually got a single nucleus , but sum got no nuclei , while others got several . This can result from normal development , as in the maturation of mammalian red blood cells , or from faulty cell division .