IB Biology SL B3.1.7 Leaf gas exchange adaptations
IB Biology SL B3.1.7 Leaf gas exchange adaptations
Practise linking leaf structures to gas exchange, carbon dioxide entry, water loss control and evidence from images or stomatal graphs.
How this is tested
- explain how stomata, guard cells and air spaces help gas exchange in leaves
- trace the route of carbon dioxide from the air to chloroplasts in mesophyll cells
- predict stomatal patterns on leaf surfaces using water loss evidence