A student poured a solution of bromthymol blue indicator into three test tubes. Then, he placed an aquatic plant in two of the test tubes, as shown below. He placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromthymol blue turns from blue to yellow in the presence of CO2. Bromothymol blue can turn back to blue when oxygen is present again. Predict the color of the solutions in the conditions described. * Blue Yellow Test tube 1 in the dark for 24 hrs Test tube 2 and 3 after being in the dark for 24 hrs Test tube 3 after being in the dark for 24 hrs and then returned to a sunny window for 24 more hrs.