Classification and evolution

• Classifications + Evolution

  • Problem; mil diff living organism kinds + many share key characteristics - need way to identify similar groups
  • 2 possible classification systems
  • Natural system: show related groups by physiology, morphology + behaviour
  • Artificial system: groups for other reason - calling all that flies a bird
  • Definitions
  • Classification:
  • Put living organisms in groups
  • Based on detailed study of similarities + differences between species individuals
  • Taxonomy:
  • Study of principles behind classification
  • i.e study of differences between species
  • Phylogeny:
  • Study of evolutionary relationships between species
  • i.e. how closely different species are related
  • Extinct: No species members still alive - all dead
  • Extant: Species members still alive - living