All About Dichotomous Key By: Anahi King


  • Classification: an arrangement of organisms in orderly groups based on their similarities.
  • Taxonomy: branch of biology that identifies, names and classifies species based on their natural relationships.

Dichotomous Key Explained

What's a starfish?

A common starfish or seastar

(Asterias rubens)

  • Kingdom Animalia
  • Phylum Echinodermata
  • Class Asteroidea
  • Order Forcipulata
  • Family Asteriidae
  • Genus Asterias
  • Species rubens

Binomial nomenclature

The system of nomenclature in which two terms are used to classify a species of a living organism, the first one indicating the "Genus" and the second one indicating the specific epithet or "species". (Genus species)


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