In which of the following pairs of parts of a flowering plant epidermis is absent

Options

A. Root tip and shoot tip
B. Shoot bud and floral bud
C. Ovule and seed
D. Petiole and pedicel

Explanation

To determine which pair of parts of a flowering plant lacks epidermis, we need to understand the role of epidermis and the characteristics of the specified plant parts.

### Step-by-Step Solution:

1. **Understanding Epidermis**:
- The epidermis is the outermost layer of cells in various plant organs. It serves as a protective barrier and is involved in various functions, including gas exchange and water regulation.

2. **Identifying Meristematic Regions**:
- Meristematic tissues are regions of actively dividing cells. These tissues are responsible for the growth of the plant. The root tip and shoot tip are examples of such regions.

3. **Evaluating Each Option**:
- **Option A: Root tip and Shoot tip**:
- Both of these parts are meristematic regions where cells are actively dividing. As a result, they do not have differentiated epidermal cells, meaning the epidermis is absent.
- **Option B: Shoot bud and Floral bud**:
- These are parts of the plant that are not actively dividing in the same way as root and shoot tips. They do have epidermis.
- **Option C: Ovule and Seed**:
- Both ovules and seeds are differentiated structures and have epidermal layers.
- **Option D: Petiole and Radical**:
- The petiole (leaf stalk) and radical (embryonic root) are also differentiated parts of the plant and possess epidermis.

4. **Conclusion**:
- Based on the analysis, the only pair of parts where epidermis is absent is **Option A: Root tip and Shoot tip**.

### Final Answer:
The correct answer is **Option A: Root tip and Shoot tip**.

---