Scientists investigate two structures in a newly discovered multicellular organism. Both structures help to digest food.
| Structure | Observations |
|---|---|
| P | All the cells have a similar structure. The cells work together to make and release digestive enzymes. |
| Q | One group of similar cells makes and releases digestive enzymes. A second group of similar cells contracts to move food. A third group of similar cells covers the inner and outer surfaces. |
Explain how the observations show that structures P and Q are at different levels of organisation. Predict how digestion would be affected if the cells that contract stopped working.
34 exam-style questions on AQA GCSE Biology 2.1 Principles of organisation, covering 2.1 Principles of organisation. Each one has a worked solution and a mark scheme showing where the marks go.