The flagellate structures in acellular slime moulds are

Options

A. Myxamoebae
B. Swarm cells
C. Spores
D. Both B and C.

Answer

To answer the question about the flagellate structures in acellular slime molds, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Acellular Slime Molds**: Acellular slime molds, also known as plasmodial slime molds, are unique organisms that consist of a large cell containing multiple nuclei. Unlike typical multicellular organisms, they do not have distinct cellular boundaries.

2. **Identify the Structures**: In acellular slime molds, the flagellate structures are crucial for their life cycle. These structures are involved in the initial stages of their development.

3. **Recognize the Role of Flagellated Cells**: The flagellated cells that contribute to the formation of the plasmodial structure are known as swarm cells. These cells are motile and play a significant role in the life cycle of acellular slime molds.

4. **Evaluate the Options**:
- **Myxamoeba**: This is a type of amoeba that lacks flagella and is not relevant to the question.
- **Swarm Cells**: These are indeed the flagellated structures in acellular slime molds, as they fuse to form the plasmodial structure.
- **Spores**: While spores are part of the life cycle, they are not flagellated structures.
- **Both B and C**: This option suggests that both swarm cells and spores are flagellated structures, which is incorrect.

5. **Conclusion**: Based on the information, the correct answer is option B, which identifies swarm cells as the flagellate structures in acellular slime molds.

### Final Answer:
The flagellate structures in acellular slime molds are **swarm cells** (Option B).