A dorsiventral leaf has

Options

A. palisade tissue on both sides
B. spongy tissue on both sides
C. palisade tissue on upper side and spongy tissue on lower side
D. spongy tissue on upper side and palisade tissue on lower side

Answer

To answer the question "A dorsiventral leaf has," we need to understand the structure of dorsiventral leaves and the arrangement of their tissues.

### Step-by-Step Solution:

1. **Definition of Dorsiventral Leaf**:
- A dorsiventral leaf is characterized by having two distinct surfaces: an upper (adaxial) surface and a lower (abaxial) surface. This type of leaf is common in many dicotyledonous plants.

2. **Tissue Arrangement**:
- In dorsiventral leaves, the arrangement of tissues is not uniform on both sides. Instead, there is a specific arrangement of palisade and spongy tissues.

3. **Palisade Tissue**:
- The palisade tissue is a type of parenchyma that is found just below the upper epidermis. It consists of tightly packed, elongated cells that are rich in chloroplasts, making it the primary site for photosynthesis.

4. **Spongy Tissue**:
- The spongy tissue, also known as spongy parenchyma, is located above the lower epidermis. It consists of loosely arranged cells that create air spaces, facilitating gas exchange and allowing for the diffusion of gases.

5. **Conclusion**:
- In a dorsiventral leaf, the palisade tissue is located on the upper side (adaxial surface), while the spongy tissue is located on the lower side (abaxial surface). Therefore, the correct answer to the question is that dorsiventral leaves have palisade tissue on the upper side and spongy tissue on the lower side.

### Final Answer:
The correct option is: **Palisade tissue on upper side and spongy tissue on lower side (Option 3)**.

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