AP® Biology Investigation #11: Transpiration

Students will study the process of transpiration/transpiration pull and the role it plays in water/

nutrient movement in plants. They will study the role of stomata in relation to the transpiration

process using a potometer to examine the rate of transpiration in a bean seedling

under a select set of environmental conditions. They will also examine the location/density

of stomata from a leaf surface by preparing a stomatal peel. Lastly students will design and

conduct an experiment to show how altering an environmental condition may affect the rate

of transpiration. Meets AP Science Practices 1, 2, 4, 6, and 7, and Big Idea 4. Materials

provided for 32 students in eight lab groups.