The given experimental set-up demonstrates

Options

A. photosynthesis
B. aerobic respiration
C. anaerobic respiration
D. ascent of sap

Answer

C

Explanation

In the test tube full of mercury (figure A) there is no air and, therefore, the introduced soaked seeds do not get air for their respiration. But they are capable of respiration in the absence of oxygen as is indicated bu a evolution of carbon dioxide (figure B). Therefore, anaerobuc respiration takes place dioxide (figure B). Therefore, anaerobic respiration takes place in the seeds in the absence of free oxygen. The experiment also shows that `CO_(2)` is evolved in anaerobic respiration of seeds.