# Explain how both abiotic and biotic factors can affect the size of a population of rabbits living in a grassland ecosystem.

> Edexcel GCSE Biology (1BI0) — 9.1 Ecosystems · Explain · 4 marks

## Mark scheme (4 marks)

1. Correct identification of a relevant abiotic factor
2. Explanation of how the named abiotic factor affects rabbit population size
3. Correct identification of a relevant biotic factor
4. Explanation of how the named biotic factor affects rabbit population size

## Key terms

- [biotic factors](https://www.gradenine.co.uk/glossary/biotic-factors)
- [ecosystem](https://www.gradenine.co.uk/glossary/ecosystem)
- [population](https://www.gradenine.co.uk/glossary/population)

## Related

- [Revision notes for Edexcel GCSE Biology (1BI0)](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-how-both-abiotic-and-biotic-4a8aac96) · Published by Druglandscape Ltd.