Definition
Monera refers to a biological kingdom that was used to classify single-celled organisms lacking a true nucleus. Think of it as the 'OG' kingdom ๐โthe first life forms! These are prokaryotes, meaning their DNA isn't housed inside a nucleus like ours. Bacteria and archaea were the main groups within Monera. Since then, scientists have refined classification, dividing Monera into Bacteria and Archaea. These organisms are vital for nutrient cycling and some cause disease.