Question

3 which of the following diagrams represents the correct cycling of gasses? diagrams a, b, c, d show cycles involving respiration, photosynthesis, and gasses (o₂, co₂, h₂) with arrows between them. a: respiration ↔ o₂, photosynthesis ↔ co₂; b: respiration ↔ co₂, photosynthesis ↔ h₂; c: photosynthesis ↔ h₂, respiration ↔ o₂; d: photosynthesis ↔ o₂, respiration ↔ co₂

Explanation:

Photosynthesis uses \(CO_2\) and produces \(O_2\); respiration uses \(O_2\) and produces \(CO_2\). Diagram D shows Photosynthesis taking \(CO_2\) and producing \(O_2\), and Respiration taking \(O_2\) and producing \(CO_2\), matching the gas cycle. Other options have incorrect gas (like \(H_2\)) or reversed processes.

Answer:

D. Photosynthesis (takes \(CO_2\), produces \(O_2\)) and Respiration (takes \(O_2\), produces \(CO_2\)) diagram