Arrangement of sepals and petals with respect to each other in the floral bud is called

Options

A. Vernation
B. Venation
C. Aestivation
D. Phyllotaxy

Answer

To solve the question regarding the arrangement of sepals and petals with respect to each other in a floral bud, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes how sepals and petals are arranged in a floral bud. This is a specific botanical term that relates to flower morphology.

2. **Identifying Key Terms**: The options provided are:
- A) Venetian
- B) Venetian (likely a typo or repetition)
- C) Estivation
- D) Phyllotaxy

3. **Eliminating Incorrect Options**:
- **Venetian**: This term does not relate to floral arrangements. It seems to be a distraction.
- **Phyllotaxy**: This term refers to the arrangement of leaves on a stem, not the arrangement of floral parts.

4. **Understanding Estivation**:
- Estivation is the correct term that refers to the arrangement of sepals and petals in a floral bud. It describes how these parts are positioned relative to one another before the flower opens.

5. **Types of Estivation**:
- The video mentions four types of estivation:
- **Valvate**: Where petals touch at the margins without overlapping.
- **Twisted**: Where sepals or petals overlap in a specific direction.
- **Imbricate (Embroidery)**: Where petals overlap randomly without a specific direction.
- **Vexillary**: A specific arrangement seen in certain flowers like peas, where one petal is larger and overlaps the others.

6. **Conclusion**: Based on the understanding of the terms and the elimination of incorrect options, the answer to the question is **C) Estivation**.

### Final Answer:
C) Estivation