An aphid pushes its sharp mouthparts into the stem of a bean plant and feeds on the sap. From which tissue does the aphid take the sap, and what does this sap mainly contain?
Xylem, and the sap it takes mainly contains mineral ions
Xylem, and the sap it takes mainly contains dissolved sugars
Phloem, and the sap it takes mainly contains dissolved sugars
Phloem, and the sap it takes mainly contains mineral ions
58 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.