Cellular slime moulds is

Options

A. Dictyostelium
B. Fuligo
C. Physarum
D. All the above.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Cellular Slime Moulds**: Cellular slime moulds are a type of protist that exhibit characteristics of both fungi and amoebae. They are primarily known for their unique life cycle, which includes a multicellular stage.

2. **Identifying the Correct Genus**: The genus that represents cellular slime moulds is *Dictyostelium*. This genus is known for its species, *Dictyostelium discoideum*, which is a well-studied model organism in biology.

3. **Characteristics of *Dictyostelium***: *Dictyostelium discoideum* is a soil-dwelling amoeba that can exist as a single cell but can also aggregate to form a multicellular structure under certain conditions. Importantly, each cell in this genus is typically uninucleate, meaning it contains only one nucleus.

4. **Distinguishing from Acellular Slime Moulds**: It is essential to differentiate cellular slime moulds from acellular slime moulds. Acellular slime moulds, such as *Fuligo* and *Physarum*, are multinucleate organisms. This means they consist of a single cell that contains multiple nuclei, which is not the case for cellular slime moulds.

5. **Conclusion**: Based on the characteristics and the classification, the correct answer to the question "Cellular slime moulds is" is *Dictyostelium*.