And all the necessary reading:
OBLIGATORY PRACTICAL #7 POTOMETER. The use of a potometer for measuring and comparing rates of transpiration in different environmental conditions is the one obligatory HL practical, which may be tested in Paper 3. There are available several virtual labs.
- This is the McGraw-Hill virtual transpiration lab, investigating the effect of different environmental conditions on the rate of transpiration of different species of plant: http://www.mhhe.com/biosci/genbio/virtual_labs_2K8/pages/PlantTranspiration.html
- Another, from Pearson (The Biology Place) is a very thorough work out which includes links to labs on, or information about, water potential, osmosis, water flow in plants, stomata and guard cells, photosynthesis and several other related themes. But there do not seem to be complete, simulated results from a transpiration investigation from which to work.) http://www.phschool.com/science/biology_place/labbench/lab9/intro.html
- From classzone, this is the best of the virtual labs, but needs you to patiently to go through each and every step before you can advance further: https://www.classzone.com/books/hs/ca/sc/bio_07/virtual_labs/virtualLabs.html