Which row correctly describes structural features of veins, arteries, and capillaries?
| Valves present in veins | Thick walls in arteries | Valves present in capillaries | |
|---|---|---|---|
| A | yes | yes | no |
| B | yes | no | yes |
| C | no | yes | no |
| D | no | no | yes |
Row A
Row B
Row C
Row D
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.