An organism is sealed in a chamber. Scientists measure the amount of carbon dioxide and oxygen in the chamber. In 3–5 sentences, explain how they can use the volumes of these gases to determine if photosynthesis or cellular respiration is occurring in in the chamber.

Answer 1

Scientists can determine if photosynthesis or cellular respiration is occurring in the chamber by measuring the relative volumes of carbon dioxide (CO2) and oxygen (O2). During photosynthesis, plants consume CO2 and produce O2, leading to a decrease in CO2 levels and an increase in O2 levels. Conversely, during cellular respiration, organisms take in O2 and release CO2, resulting in an increase in CO2 and a decrease in O2. By monitoring these gas concentrations over time, scientists can identify the predominant process occurring in the chamber.