In dinophyceae the two flagella are

Options

A. Anterior
B. One transverse and oher vertical
C. Lateral
D. Posterior.

Answer

To answer the question about the two flagella in Dinophyceae, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Dinophyceae, commonly known as dinoflagellates, are a group of unicellular algae.

2. **Understand the Structure**: Dinoflagellates are characterized by having two flagella. These flagella are unequal in size and function.

3. **Describe the Flagella**:
- **Transverse Flagellum**: One of the flagella is transverse, which is referred to as the **cingulum**. This flagellum wraps around the body of the dinoflagellate.
- **Vertical Flagellum**: The other flagellum is vertical, known as the **sulcus**. This flagellum extends vertically from the cell.

4. **Function of the Flagella**: The two flagella beat in perpendicular directions, which allows dinoflagellates to move efficiently through their aquatic environments.

5. **Conclusion**: Therefore, in Dinophyceae, the two flagella are one transverse (cingulum) and the other vertical (sulcus).

### Final Answer:
In Dinophyceae, the two flagella are one transverse and the other vertical.

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