In a dorsiventral leaf, location of palisade tissue and phloem is respectively on the ______ and ________ surfaces.

Options

A. adaxial and abaxial
B. adaxial and adaxial
C. abaxial and adaxial
D. abaxial and abaxial

Explanation

To answer the question regarding the location of palisade tissue and phloem in a dorsiventral leaf, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of a Dorsiventral Leaf**:
- A dorsiventral leaf has two distinct surfaces: the upper (adaxial) surface and the lower (abaxial) surface.

2. **Identify the Location of Palisade Tissue**:
- The palisade parenchyma is located just below the upper epidermis (adaxial surface) of the leaf. This tissue is typically composed of tightly packed cells that are rich in chloroplasts, making it the primary site for photosynthesis.

3. **Identify the Location of Phloem**:
- The phloem is typically located in the vascular bundles, which are distributed throughout the leaf. In a dorsiventral leaf, the phloem is generally found closer to the lower epidermis (abaxial surface) as part of the vascular tissue that transports nutrients.

4. **Conclude the Answer**:
- Therefore, the palisade tissue is located on the **adaxial surface** and the phloem is located on the **abaxial surface** of a dorsiventral leaf.

### Final Answer:
In a dorsiventral leaf, the location of palisade tissue and phloem is respectively on the **adaxial** and **abaxial** surfaces.

---