# A salmon is a fish that lives in the sea but swims upstream into rivers to lay its eggs. Describe four characteristics of living organisms that a salmon demonstrates during its lifetime.

> Cambridge International IGCSE Biology (0610) — 1.1 Characteristics of living organisms · Describe · 4 marks

## Mark scheme (4 marks)

1. Movement — the salmon moves all or part of itself (e.g. swimming upstream)
2. Sensitivity — the salmon detects and responds to changes in its environment (e.g. detects river currents / water chemistry to navigate)
3. Reproduction — the salmon produces more salmon of the same kind (lays eggs / fertilises eggs)
4. Nutrition / Respiration / Excretion / Growth — any ONE further characteristic correctly described in the context of the salmon

## Related

- [Revision notes for Cambridge International IGCSE Biology (0610)](https://www.gradenine.co.uk/learn)
- [How to answer "Describe" 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/a-salmon-is-a-fish-that-830ed1d4) · Published by Druglandscape Ltd.