# Explain why the binomial system of nomenclature is used by scientists worldwide when classifying organisms, rather than using common names.

> OCR A-Level Biology A (H420) — 4.3 Classification and evolution · Explain · 4 marks

## Mark scheme (4 marks)

1. Common names vary between languages or regions, causing confusion
2. The binomial system provides a unique, universally agreed name for each species
3. The genus name indicates the organism's closest relatives / membership of a genus, revealing evolutionary relationships
4. Latin / Greek is a dead language so the meaning of names does not change over time, ensuring stability

## Key terms

- [binomial system](https://www.gradenine.co.uk/glossary/binomial-system)
- [nomenclature](https://www.gradenine.co.uk/glossary/nomenclature)
- [classifying](https://www.gradenine.co.uk/glossary/classifying)

## Related

- [Revision notes for OCR A-Level Biology A (H420)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/explain-why-the-binomial-system-of-63e0e81d) · Published by Druglandscape Ltd.