A grower raises young pepper plants in two trays. The plants in tray 1 receive a growing solution containing very little magnesium, and their leaves become yellow. The plants in tray 2 receive a growing solution containing enough magnesium, and their leaves remain green. The two trays are kept next to each other.
Name the green pigment made by plants using magnesium ions.
Predict whether the yellowing in tray 1 will spread to the plants in tray 2. Explain your answer.
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.