A fungal disease is present in a group of strawberry plants. A scientist sets up two investigations using healthy strawberry plants.
In setup P, aphids can move from the diseased plants to the healthy plants.
In setup Q, a mesh prevents aphids moving from the diseased plants to the healthy plants. All other conditions are the same.
Which result would support the conclusion that aphids act as vectors of the fungus?
No healthy plants become diseased in either setup P or setup Q
Healthy plants become diseased in setup P but not in setup Q
Healthy plants become diseased in setup Q but not in setup P
Equal numbers of healthy plants become diseased in setups P and Q
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.