This key facts covers Functions of Transpiration within Transpiration for GCSE Biology. Transpiration process, stomatal control, factors affecting rate, plant adaptations, measuring transpiration, and practical investigations It is section 9 of 21 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Functions of Transpiration
| Function | Mechanism | Benefit |
|---|---|---|
| Cooling | Evaporation removes latent heat | Prevents overheating in sunlight |
| Mineral transport | Minerals dissolved in transpiration stream | Delivers nutrients to all cells |
| Water distribution | Creates pull from roots to shoots | Supplies water for photosynthesis |
| Turgor maintenance | Continuous water flow maintains pressure | Keeps non-woody plants upright |
| Concentration of sugars | Water loss concentrates phloem sap | Aids sugar transport |
Practice questions for Transpiration
What is transpiration?
Describe the three stages of transpiration in a leaf.
Quick recall flashcards
What is a potometer?
An apparatus that measures the rate of water uptake by a plant shoot. Used to estimate transpiration rate (though actually measures uptake, not loss).
What is a xerophyte?
A plant adapted to survive in dry/arid conditions with limited water availability (e.g., cacti, marram grass).