moneran
Bacterium, for example
A moneran is a single-celled organism lacking a membrane-bound nucleus—bacteria and their relatives.
The term belongs to an older classification system that grouped all prokaryotes together in the kingdom Monera.
Modern biology has largely abandoned this grouping, splitting prokaryotes into Bacteria and Archaea, but moneran still appears in older textbooks and general discussions of microscopic life.
Cell without nuclear membrane
- archaeaThird domain of life
- cyanobacteriaPhotosynthetic bacteria producing oxygen
- bacteriaNucleus-free single-celled organisms
- nucleoidProkaryotic chromosome region
binary fission · plasmid · ribosome · flagellum · capsule · endospore · cell wall · chromosome
Existing from the start
- ancestralOf one's forebears
- ancientVery old indeed
- progenitorAncestor or originator
- evolutionaryPertaining to gradual biological change
rudimentary · unicellular · simplistic · foundational · early · prehistoric · fossil · origin
Microscopic living organism
- microorganismMicroscopic living entity
- germDisease-causing microorganism
- pathogenDisease-causing microorganism
- microbiomeBody's microbial community
microbiota · microflora · biofilm · colony · infection · cultivation · petri · agar
Monarch's ruled territory
- classificationSystematic grouping by traits
- taxonomyScience of categorical arrangement
- domainArea of control
- phylumMajor classification rank
Whittaker · clade · systematics · nomenclature · taxon · outdated · reclassified · superseded
prokaryote
Cell without nuclear membrane
- archaeaThird domain of life
- cyanobacteriaPhotosynthetic bacteria producing oxygen
- bacteriaNucleus-free single-celled organisms
nucleoid · binary fission · plasmid · ribosome · flagellum · capsule · endospore · cell wall · chromosome · cytoplasm
primordial
Existing from the start
- ancestralOf one's forebears
- ancientVery old indeed
- progenitorAncestor or originator
evolutionary · rudimentary · unicellular · simplistic · foundational · early · prehistoric · fossil · origin · simple
microbe
Microscopic living organism
- microorganismMicroscopic living entity
- germDisease-causing microorganism
- pathogenDisease-causing microorganism
microbiome · microbiota · microflora · biofilm · colony · infection · cultivation · petri · agar · culture
kingdom
Monarch's ruled territory
- classificationSystematic grouping by traits
- taxonomyScience of categorical arrangement
- domainArea of control
phylum · Whittaker · clade · systematics · nomenclature · taxon · outdated · reclassified · superseded