What types of organisms are prokaryotic and lack a true nucleus?

Bacteria and Archaea

Explanation:

Single-celled organisms belonging to the Bacteria and Archaea domains are known as prokaryotes. Prokaryotic cells are smaller than eukaryotic cells and lack a nucleus and organelles. A cell wall surrounds all prokaryotic cells. Many of them also feature a polysaccharide capsule or slime layer.

the bedroo..

i think the miocene epoch spans the time from 23 million to 12 million years ago.