IMSO 2019 Science International - Theory I Question 13

Question 13

Three sealed glass tanks stand outside on a sunny day for twelve hours: X contains mushrooms, Y a green plant, Z a mouse. Which option correctly describes changes in carbon dioxide and oxygen?

Question illustration

X: CO₂ ↑, O₂ ↓; Y: CO₂ ↓, O₂ ↑; Z: CO₂ ↑, O₂ ↓
X: CO₂ ↑, O₂ ↑; Y: CO₂ ↓, O₂ ↓; Z: CO₂ ↓, O₂ ↓
X: CO₂ ↓, O₂ ↑; Y: CO₂ ↓, O₂ ↑; Z: CO₂ ↑, O₂ ↓
X: CO₂ ↓, O₂ ↓; Y: CO₂ ↓, O₂ ↑; Z: CO₂ ↑, O₂ ↓