A scientist grew equal-aged radish seedlings for 21 days in two nutrient solutions. The solutions were identical except that one contained very little magnesium.
| Nutrient solution | Mean chlorophyll concentration in leaves in mg per g of leaf tissue | Mean increase in dry mass in g |
|---|---|---|
| P | 2.1 | 0.46 |
| Q | 0.7 | 0.18 |
Which nutrient solution contained very little magnesium?
Explain your answer using the data.
The scientist repeated the investigation after adding enough magnesium ions to the deficient solution. All other conditions remained the same.
Predict and explain how the mean increase in dry mass would compare with the original result for the deficient solution.
133 exam-style questions on AQA GCSE Biology 3.3 Plant disease, covering 3.3.1 Detection and identification of plant diseases and 3.3.2 Plant defence responses. Each one has a worked solution and a mark scheme showing where the marks go.