Across
- 1. Cells that control the opening and closing of the stomata.
- 6. There are none of these in mature xylem vessels.
- 7. Impermeable substance that give strength to the xylem vessels.
- 8. Created in the xylem vessels by the transpiration pull.
- 9. The pressure gradient in the phloem sieve tubes.
- 11. Force of attraction between water molecules.
- 12. The pressure in xylem vessels
- 13. An increase in this factor reduces the rate of tranpiration.
Down
- 2. The main route that water takes across the cortex of the root.
- 3. The vessels that transport water and mineral ions in the plant.
- 4. The cells that support the phloem.
- 5. Property of molecules that can be used to trace the movement of substances in a plant.
- 10. The passive movement of molecules up a narrow tube.