IB Biology HL B3.1.9 Transpiration
IB Biology HL B3.1.9 Transpiration

IB Biology syllabusFirst assessment 2025
Practise explaining transpiration rate using environmental conditions, potometer evidence and comparisons between plant treatments.
How this is tested
- interpret how temperature, humidity and wind speed change transpiration rate
- use potometer diagrams to predict when water uptake will be fastest
- compare plant treatment data and link leaf presence to water loss
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