Answer: stomata.
- A stomata
- B leaf veins
- C root hairs
- D flower petals
Correct answer: A. stomata
Explanation: Stomata allow CO₂ in and O₂ out of the leaf.
Simplified photosynthesis diagram: light energy, CO2, and H2O enter the leaf and are converted in the chloroplast into glucose and O2.
Concept context
Light reactions, the Calvin cycle, C 3 /C 4 /CAM pathways, photorespiration, and factors affecting the rate of photosynthesis. One of the highest-yield NEET chapters.