Question

The figure below is a diagram of a potometer

1. What is it used for?
2. State one precautions which should be taken when setting up a photometer 

Answer 1

1. To estimate the rate of transpiration by measuring the rate of water uptake by a plant shoot.
2.    
   • Stem of the shoot should be cut and fixed into to potomoter under water to prevent air entering into the xylem vessels. 
   • All joints should be water tight