A researcher is investigating the rate of photosynthesis in the aquatic plant Cabomba aquatica. They attempt to measure the rate of oxygen production by counting the bubbles released from a cut stem over a 5-minute period.
However, they find that the bubbles are produced too rapidly to count accurately, and many bubbles coalesce (merge together) before reaching the surface.
Describe how the experimental setup could be modified to obtain more precise, quantitative data for the volume of gas produced.
