OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Investigating Transpiration: The PotometerFill the tubing and capillary tube with water. Cut the shoot under water and fit its stem into the tubing, keeping the cut end under water so that air does not enter the xylem. Seal the joint around the stem to make the apparatus airtight.