Classification and Biodiversity

  • Classification - way in which living organisms are divided into groups.
  • Taxonomy - scientific practice of grouping organisms based on shared charaqcteristics. 
  • Hierarchical classification systems:  consists of large groups that are divided into progressively smaller groups, there's no overlap between groups
  • Phylogentic classification systems: this means that it's based on the evolutionary history of organisms (e.g their common ancestry)
  • Domain
  • Keeping - Kingdom
  • Precious - Phylum
  • Creatures - Class
  • Organised - Order
  • For - Family
  • Grumpy - Genus
  • Scientists - Species
  • Six kingdoms - Bacteria, Archaea, protoctista, fungi, plants and animals. 
  • Biological name is derived from it's GENUS and SPECIES NAMES (genus first!!!)
  • Phylogenetic system - reflects the evolutionary relationship between organisms, looks at similarities and differences in structure and function. in the phylogenetic tree, the oldest species are at the base of the tree with most recent ones represented by the ends of the tree.
  • Each branch represents where divergence occurred. The closer the branches, the closer the evolutionary relationship, therefore the more recently they shared a common ancestor. 
  • to classify organisms, can use: genome sequencing, comparing amino acid sequences, and immunological comparisons. 
  • Species: a group of organisms with


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