Concept:Oxygen produced during photosynthesis leaves the cell by diffusing through the cell membrane into the surrounding air spaces.Explanation:Photosynthesis occurs inside the chloroplast and produces oxygen gas (O2).This oxygen first diffuses from the chloroplast into the cytoplasm.From the cytoplasm, it passes out of the cell through the cell membrane to reach the air spaces.In the diagram, the part labeled II represents the cell membrane.Hence, oxygen diffuses out through part II.Answer:B. II
