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A-Level Biology OCR A

Classification Groups Advantages Phylogenetic Phylogeny Orchids Describe Trees

Advantages of phylogenetic trees over traditional classification include showing true evolutionary relationships (e.g., dolphin-mammal vs fish), their continuous nature, and that traditional taxonomic groups imply an equivalence that doesn't always exist.

I vantaggi degli alberi filogenetici rispetto alla classificazione tradizionale includono la capacità di mostrare relazioni evolutive reali (es. delfino-mammifero vs pesce), la natura continua degli alberi e il fatto che i gruppi tassonomici tradizionali implicano un'equivalenza che non sempre esiste.

Front Describe the advantages of using phylogenetic trees as a form of classification as opposed to just using taxonomic groupings.
Back Advantages of phylogenetic trees:
  • Species can have similar characteristics (dolphins and fish) but phylogeny confirms they come from different ancestors 
  • Phylogeny produces continuous tree, classification requires discrete taxonomical groups (not forced to put organisms in groups they dont quite fit)
  • Classification implies different groups within the same rank are equivalent (cats and orchids both families but orchids 70mil years older)

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