A plant health officer compares reports about four plant health problems.
Which one of these reports is evidence that a problem is communicable?
Affected plants recover after mineral ions are added to the soil.
The affected plants have both stunted growth and discoloured leaves.
All affected plants are growing in soil with too few mineral ions.
Removing affected plants reduces the number of new cases nearby.
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.