A student cuts two pieces of celery stalk of the same size. The student places one piece in solution P and the other in solution Q for 30 minutes.
| Solution | Concentration compared with the cytoplasm of the celery cells | Observation after 30 minutes |
|---|---|---|
| P | more dilute | firm |
| Q | more concentrated | flexible |
Name the process by which water moves through the partially permeable cell membranes of the celery cells.
Explain why the two pieces of celery have different firmness after 30 minutes.
80 exam-style questions on Edexcel GCSE Biology 6.2 Transport in plants, covering 6.2.1 Root hair cell adaptations, 6.2.2 Structure of xylem and phloem, 6.2.3 Transpiration and stomata, 6.2.4 Translocation of sucrose, 6.2.5 Leaf structure for photosynthesis, 6.2.6 Environmental factors on water uptake, 6.2.7 Rate calculations for transpiration, and 6.2.8 Plant adaptations to extreme environments. Each one has a worked solution and a mark scheme showing where the marks go.