Two plants have the same total leaf area and are tested at the same temperature, light intensity and air speed.
The table shows their leaf features.
Table
| Plant | Cuticle | Position of stomata |
|---|---|---|
| P | Thick | Sunken in pits |
| Q | Thin | Level with the leaf surface |
Which explanation best predicts a lower water loss in P?
Its cuticle restricts evaporation and its pits retain moist air.
Its cuticle increases evaporation and its pits retain moist air.
Its cuticle restricts evaporation and its pits remove moist air.
Its cuticle increases evaporation and its pits remove moist air.
43 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.