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

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

> A flowering plant found in the rainforests of Brazil is known by at least six different common names depending on the region and language of the local community. When a research team publishes their findings on this plant's ecology, they use a single two-part Latin name throughout their paper.

## Mark scheme (4 marks)

1. The binomial system provides a universal/internationally agreed name, understood by scientists regardless of language or country
2. Common names vary between regions/languages and can refer to different species, causing confusion or ambiguity
3. Each binomial name is unique to one species, with the genus name followed by the species name, preventing misidentification
4. The use of Latin (a dead language) means the names remain stable over time and are not subject to change through everyday language use

## Key terms

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

## 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)

---
Source: [GradeNine](https://www.gradenine.co.uk/q/explain-why-the-binomial-system-of-c18d4390) · Published by Druglandscape Ltd.