Transverse flagellum of dinophyceae is

Options

A. Narrow
B. Ribbon like
C. With delicate threads
D. Both B and C.

Answer

To answer the question regarding the transverse flagellum of Dinophyceae, we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding Dinophyceae**:
- Dinophyceae, commonly known as dinoflagellates, are a group of unicellular eukaryotes characterized by their two flagella.

2. **Identifying the Transverse Flagellum**:
- Dinoflagellates possess two types of flagella: a longitudinal flagellum and a transverse flagellum. The transverse flagellum is positioned in a groove around the cell.

3. **Description of the Transverse Flagellum**:
- The transverse flagellum is described as a "wavy ribbon." This means that it has a ribbon-like appearance and undulates as it moves.

4. **Function of the Exoneme**:
- The movement of the transverse flagellum is facilitated by the action of the exoneme, which runs along the flagellum. The exoneme is a structural component that helps in the undulating motion.

5. **Characteristics of the Flagellum**:
- The edge of the exoneme has simple hairs (or delicate threads) that can vary in length. These hairs contribute to the flagellum's movement and are part of its structure.

6. **Conclusion**:
- Based on the description, the transverse flagellum of Dinophyceae is a wavy ribbon-like structure with delicate threads (simple hairs). Therefore, the correct answer to the question is "both B and C."

### Final Answer:
The transverse flagellum of Dinophyceae is a wavy ribbon-like structure with delicate threads, making the correct option "both B and C."

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