stomata in water lily and podostenon occur respectively of

Options

A. Lower leaf surface and absent on upper leaf surface
B. Upper leaf surface nd absent on lower leaf surface
C. Both leaf surfaces
D. Absent in both

Answer

**Step-by-Step Solution:**

1. **Understanding the Plants**: The question refers to two aquatic plants: water lily and Podostemon. Both are hydrophytic, meaning they are adapted to living in water.

2. **Location of Stomata in Water Lily**: Water lilies have leaves that float on the surface of the water. The stomata (small openings for gas exchange) are primarily located on the upper surface of the leaves. This positioning allows them to efficiently exchange gases with the atmosphere above the water.

3. **Location of Stomata in Podostemon**: In contrast, Podostemon is typically submerged underwater. As a result, it does not have stomata on the lower surface of its leaves because they are always underwater, which makes gas exchange with the atmosphere unnecessary.

4. **Conclusion**: Based on the above observations, we can conclude that stomata in water lily are present on the upper leaf surface, while in Podostemon, they are absent on the lower leaf surface.

5. **Final Answer**: Therefore, the correct answer to the question is option B: stomata in water lily are on the upper leaf surface, and in Podostemon, they are absent on the lower leaf surface.

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