In which type, the stomata are present exclusively on the upper surface of the leaves
(a) Potato type
(b) Potamogeton type
(c) Barely type
(d) Water Lily type

Options

A. Potato type
B. Potamogeton type
C. Barely type
D. Water Lily type

Answer

To solve the question regarding which type of plant has stomata exclusively on the upper surface of the leaves, we can analyze each option provided:

1. **Understanding Stomata**: Stomata are small openings on the surface of leaves that facilitate gas exchange, allowing carbon dioxide to enter for photosynthesis and enabling transpiration (water loss).

2. **Analyzing Each Option**:
- **(a) Potato type**: In potato plants, stomata are present on both the upper and lower surfaces of the leaves. Therefore, this option does not fit the criteria.
- **(b) Potamogeton type**: Similar to potato, Potamogeton also has stomata on both surfaces of the leaves. This option is also incorrect.
- **(c) Barley type**: Barley plants exhibit stomata on both the upper and lower surfaces of their leaves. Thus, this option is not correct either.
- **(d) Water Lily type**: Water lilies have leaves that float on the water surface. In these plants, stomata are exclusively located on the upper surface of the leaves to facilitate gas exchange while being submerged in water. This makes this option the correct choice.

3. **Conclusion**: The correct answer is **(d) Water Lily type**, as it is the only option where stomata are exclusively present on the upper surface of the leaves.