- Water loss scale: 99% of water absorbed is lost through transpiration
- Cooling effect: Can reduce leaf temperature by 10-15°C
- Transport height: Creates negative pressure pulling water up to 120m in tall trees
- Stomatal density: Leaves have 100-300 stomata per mm²
- Daily rhythm: Most transpiration occurs during daylight hours
- Desert adaptations: CAM plants lose 90% less water than normal plants
This key facts covers Key Facts About Transpiration within Transpiration for GCSE Biology. Transpiration process, stomatal control, factors affecting rate, plant adaptations, measuring transpiration, and practical investigations It is section 2 of 21 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Transpiration
What is transpiration?
Describe the three stages of transpiration in a leaf.
Quick recall flashcards
What is a xerophyte?
A plant adapted to survive in dry/arid conditions with limited water availability (e.g., cacti, marram grass).
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).