The Three Domains (OCR A-Level Biology A): Flashcards
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Practise the cards
10 cards from this deck
Scientist who introduced domain rank (year)
Scientist who introduced domain rank (year)
Carl Woese, 1990
Domain (taxonomic definition)
Domain (taxonomic definition)
Highest taxonomic rank, above kingdom
The three domains (names)
The three domains (names)
Bacteria, Archaea, Eukarya
Extremophiles (definition)
Extremophiles (definition)
Organisms in extreme environments (hot/cold/saline/pH)
Domain with peptidoglycan cell walls
Domain with peptidoglycan cell walls
Bacteria only
Archaea: structural type vs molecular features
Archaea: structural type vs molecular features
Prokaryotic structure; some eukaryote-like molecular traits
Domains with histone proteins
Domains with histone proteins
Archaea and Eukarya (absent in Bacteria)
DNA shape: prokaryotes vs eukaryotic nuclei
DNA shape: prokaryotes vs eukaryotic nuclei
Circular in prokaryotes; linear in eukaryotic nuclei
RNA polymerase types in each domain
RNA polymerase types in each domain
Bacteria: one type; Archaea & Eukarya: several types
Evidence type supporting three-domain system
Evidence type supporting three-domain system
Molecular (rRNA sequences, proteins, membranes, flagella)