Mammalian erythrocytes are unique among the vertebrates as they are non-nucleated cells in their mature form.

More recently, keshi has been used to refer to second harvest pearls and even to freshwater non-nucleated pearls.

Lowland Maya settlement patterns suggest non-nucleated settlement in the area, as opposed to earlier assumptions of nucleated development.

Keshi pearls are small non-nucleated pearls typically formed as by-products of pearl cultivation.

So, how lucky was the evolutionary leap from prokaryotes (non-nucleated microbes) to eukaryotes (nucleated, and using oxygen)?

But no single organism, whether nucleated or non-nucleated, one-celled or many-celled, could have spelled the planet's doom.

'Cells' are classified into two categories: simple, non-nucleated prokaryote cells, and complex, nucleated eukaryote cells.

The most prominent of these was Holm Holmsen who made basic discoveries establishing platelets as secretory non-nucleated cells.

Life was probably present throughout the Archean, but may have been limited to simple non-nucleated single-celled organisms, called Prokaryota (formerly known as Monera).

Hillhall is a townland and non-nucleated village in County Down, Northern Ireland, near Lisburn.

With the exception of non-nucleated cells (including erythrocytes), MHC class I is expressed by all host cells.

With the exception of non-nucleated cells (including erythrocytes), all cells are capable of presenting antigen through the function of major histocompatibility complex (MHC)molecules .

One imaginative but disputed hypothesis getting some support from recent computer-assisted studies of complete genome DNA sequences is that the first nucleated cell arose from two distinctly different ancient prokaryotic (non-nucleated) species that had formed a symbiotic relationship with one another to carry out different aspects of metabolism.