The given experimental set-up demonstrate:

Step-by-step solution

Respiration is the process of releasing energy in the form of ATP by breaking down glucose either in presence or absence of oxygen. The given setup above is to demonstrate anaerobic respiration. In it, few soaked seeds are taken and inserted in a test tube containing mercury. After inverting the tube and setting up as shown in part-A, the seeds float up above the mercury. On leaving the setup for 2-3 days as it is we observed that the level of mercury in the inverted test tube has gone down suggesting release and a