Matching substances to photosynthesis inputs and outputs

Steps:

• Recall photosynthesis equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, with CO₂ and H₂O as inputs, glucose and O₂ as outputs.
• In leaf diagrams, water enters via xylem (label 1), O₂ exits stomata (label 2), H₂O used in chloroplasts (label 3), CO₂ enters stomata (label 4), O₂ exits (label 5).
• Eliminate options with glucose as input or misplaced gases.
• Verify C aligns all labels with equation and leaf transport paths.

Why C is correct:

• Aligns with photosynthesis formula: water (1,3) and CO₂ (4) as inputs, oxygen (2,5) as outputs via diffusion and transport.

Why the others are wrong:

• A: Labels glucose (3) as output in input position and water (4) as output, contradicting equation.
• B: Reverses inputs/outputs, placing oxygen (1) and CO₂ (5) incorrectly as inputs.
• D: Positions glucose (2) as input via xylem and CO₂ (3) inside chloroplast, swapping roles.

Final answer: C