A botanist found abnormal transport cells in two plants. The only abnormality in each plant is shown in the table.
| Plant | Observation |
|---|---|
| 1 | End walls between cells forming xylem vessels are not lost. |
| 2 | Companion cells next to phloem cells contain far fewer mitochondria than normal. |
Explain how each abnormality would affect the movement of substances through the plant.
282 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.