An organism is sealed in a chamber. Scientists measure the amount of carbon dioxide and oxygen in the chamber. In 3 sentences, explain how they can use the volumes of these gases to determined if photosynthesis or cellular respiration is occurring in the chamber.

Answer 1

Scientists can determine the relative rates of photosynthesis and cellular respiration by measuring the volumes of carbon dioxide (CO2) and oxygen (O2) in the chamber. If the volume of CO2 decreases and the volume of O2 increases, it indicates that photosynthesis is occurring, as plants consume CO2 and release O2. Conversely, if the volume of CO2 increases while the volume of O2 decreases, it suggests that cellular respiration is taking place, as organisms consume O2 and release CO2.