Classification of Life (LC 2027) (Leaving Cert Biology): Flashcards
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Who proposed the 3-domain system & when?
Who proposed the 3-domain system & when?
Carl Woese, 1990
The 3 domains of life
The 3 domains of life
Bacteria, Archaea, Eukarya
What is a domain?
What is a domain?
Largest grouping in classification of life
Cell type of Bacteria
Cell type of Bacteria
Prokaryotic
Bacteria cell wall material
Bacteria cell wall material
Peptidoglycan
Peptidoglycan in Archaea cell walls
Peptidoglycan in Archaea cell walls
Absent
Typical Archaea habitats
Typical Archaea habitats
Extreme environments (hot, salty, acidic/alkaline)
Archaea & human diseases
Archaea & human diseases
Do not cause diseases
Key feature of Eukarya cells
Key feature of Eukarya cells
Membrane-bound nucleus
Eukarya cellular organisation
Eukarya cellular organisation
Unicellular or multicellular
Prokaryote chromosome structure
Prokaryote chromosome structure
Single, circular
Eukaryote chromosome structure
Eukaryote chromosome structure
Multiple, linear
4 major groups in Eukarya
4 major groups in Eukarya
Protists, Plants, Fungi, Animals
What is phylogeny?
What is phylogeny?
Study of evolutionary relationships between organisms