Describe how the binomial system is used to name living organisms, and state one advantage of using this system.

Eduqas GCSE Biology — 2.1.1 Classification · Describe · 4 marks · View as Markdown

Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).

Model answer (4 marks)

Each organism is given a two‑part name. The first part is the genus (generic name) and the second part is the species (specific name). Both names are written in Latin (or Greek) and are italicised, with the genus capitalised and the species in lower case.

One advantage of this system is that it is understood by scientists worldwide, making it a universal international method of naming and avoiding confusion caused by different common names.

Examiner tips

  • Use the word ‘two‑part’ or ‘binomial’ to show you know the system; mention genus and species; italicise and capitalise correctly; give the advantage in one clear sentence.

Common mistakes

  • Writing the names in plain text without italics or wrong case; forgetting to mention Latin/Greek; giving a non‑scientific advantage such as ‘easier to remember’ instead of the universal benefit.

Mark scheme (4 marks)

  1. Each organism is given two names / a two-part name
  2. The first name is the genus (generic name) and the second is the species (specific name)
  3. Names are written in Latin (or Greek)
  4. One advantage: the system is understood / used by scientists worldwide (universal / international), so there is no confusion caused by different common names

Key terms in this question

binomial system

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