Question

What‌ ‌is‌ ‌progenote?‌ ‌

Answer 1

The progenote, last universal common ancestor (LUCA) and last universal ancestor (LUA) is the most recent organism from which all organisms living on earth have a common ancestor.

Complete answer:
Progenote is a hypothetical stage in evolution. Any primordial organism in which the relationship between genotype and phenotype emerged. The three domain system is a biological classification introduced by Carl Woese in 1917. In this classification, Domains or kingdoms are present in the six kingdom classification.
This system divides cellular life forms into three categories:

Archaea Domain: Prokaryotic, no nuclear membrane.
Kingdom archaebacteria: Most simplest and primitive group of bacteria, e.g., Methanogens, Halophiles and Thermoacidophiles.
Bacteria Domain: Pathogenic prokaryotic organism, no nuclear membrane.
Kingdom Eubacteria: True bacteria, e.g., Cyanobacteria.
Eukaryote Domain: Eukaryotes with nuclear membrane.
Kingdom fungi
Kingdom plantae
Kingdom protista
Kingdom animalia
It separates prokaryotes into Eubacteria and Archaebacteria. On the basis of differences in 16S rRNA genes these archaea, bacteria and eukaryotes each develop separately from common ancestor and it is known as progenote.

Note: Woese initially used the term ‘kingdom’ to describe these primary groupings now referred to as ‘domains’. The term ‘domain’ was coined in 1990. The archaea domain is considered as the oldest species of organism on earth.