Experiment: Leaves of a plant were coated with wax to block stomatal openings. The rate of CO₂ intake was measured under light.Observation: CO₂ intake dropped drastically in wax-covered leaves.Question: What does this result indicate?
Correct answer: C. Stomata are essential for gaseous exchange in leaves.
- A. Waxy leaves improve photosynthesis.
- B. CO₂ enters only through stem bark.
- C. Stomata are essential for gaseous exchange in leaves.
- D. Plants don't need CO₂ for photosynthesis.
Explanation
The correct answer is that stomata are essential for gaseous exchange in leaves. The experiment demonstrated a significant decrease in CO₂ intake in wax-covered leaves, indicating that stomatal openings are crucial for this process. The other options are incorrect because they either introduce new concepts not related to the experiment or contradict fundamental principles of photosynthesis.
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