Mr. miller's biology class is studying cellular respiration. to model cellular respiration, they set up an experiment containing four flasks. each flask is the same size and are stoppered and placed under a floodlight. each flask also contains 200 ml of h20 and 2 ml of bromthymol blue. bromthymol blue is a chemical indicator solution that changes color from blue to yellow in the presence of co2. the students then place a vary placing a plant and fish into each flask according to the table above. which flask(s) will turn yellow and why? a) flask 1 & 3 because these flasks contain plants that undergo photosynthesis. b) flask 3 (only) because this is the only flask in which photosynthesis and cellular respiration are both taking place. c) flask 1 & 2 because there is only one process taking place in each of these flasks so the products do not get used up. d) flask 2 (only) because the fish produce co2 as products of cellular respiration and do not undergo photosynthesis therefore not consuming co2.