A plant in a dry habitat has leaf hairs around its stomata. In a new variety, the hairs are absent, but the number and position of the stomata are unchanged.
How does this change affect water loss?
It stays the same because the number and position of stomata are unchanged.
It increases because air moves more freely across the stomata, increasing water vapour diffusion.
It increases because the water vapour concentration gradient at the stomata becomes smaller.
It decreases because fewer hairs leave less surface for evaporation.
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.