A potometer actually measures the rate of

  1. translocation
  2. water uptake
  3. water loss only
  4. photosynthesis
Answer

B) water uptake

It measures uptake, which is roughly equal to transpiration. O Level Biology · Topic 7 Transport in Flowering Plants · 7.2 Transpiration and translocation

Biology MCQ · More O Level Biology: Transport in Flowering Plants MCQs · Practise