Question

grades / scope 3 - bioenergetics (cellular respiration) / q3 which of the following diagrams represents the correct cycling of gasses? diagrams labeled a and b, with respiration, photosynthesis, o₂, co₂, h₂ indicated

Explanation:

To determine the correct diagram, recall gas exchange in respiration and photosynthesis. Respiration uses \(O_2\) and produces \(CO_2\); photosynthesis uses \(CO_2\) and produces \(O_2\). Diagram A shows Respiration releasing \(CO_2\) and taking in \(O_2\), while Photosynthesis takes in \(CO_2\) and releases \(O_2\), matching the gas cycle. Diagram B has incorrect gases (involves \(H_2\), not relevant here).

Answer:

A. Diagram A (with Respiration and Photosynthesis cycling \(O_2\) and \(CO_2\) correctly)