A student poured a solution of bromothymol blue indicator into three test tubes. Then he placed an aquatic plant in tubes 2 and 3, and a snail in tube 3 only, as shown below. He placed a stopper on each test tube and placed them all in the dark for 24 hours. Bromothymol blue turns from blue to yellow in the presence of CO2. In which test tube or test tubes would you expect cellular respiration to occur? Explain your answer. Please, hurry!

Photosynthesis is the process of the formation of the food in case of plants in the presence of sunlight with the help of carbon dioxide, water and soil. The light energy is converted into the chemical energy.

The beaker is blue because plants uses carbon dioxide for their food preparation. When the beakers are kept in the dark place, instead of photosynthesis cellular respiration occur that made energy from the food for their survival.

Explanation:

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