Multinucleate , aseptate mycelium with oospore as the sexual spore is character of :

Options

A. Albugo
B. Mucor
C. Rhizopus
D. Ustilago

Answer

To solve the question regarding which organism has multinucleate, aseptate mycelium with oospores as the sexual spore, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Multinucleate**: This means that the organism has multiple nuclei within a single cell.
- **Aseptate Mycelium**: This refers to mycelium that does not have septa (cross walls) separating the cells, making it a continuous structure.
- **Oospore**: This is a type of sexual spore formed in certain fungi.

2. **Identify the Class of Fungi**:
- Fungi are classified into different classes, including Phycomycetes, Basidiomycetes, Ascomycetes, and Deuteromycetes.
- The characteristics mentioned (multinucleate, aseptate mycelium, and oospores) are typical of the class **Phycomycetes**.

3. **Characteristics of Phycomycetes**:
- In Phycomycetes, the mycelium is typically aseptate (coenocytic) and multinucleate.
- They reproduce sexually through the formation of oospores.

4. **Examples of Phycomycetes**:
- Among the examples provided (Albugo, Mucor, Rhizopus, and Astralego), the organisms that fit the description of having aseptate mycelium and producing oospores are typically found in the genus **Mucor** and **Rhizopus**.

5. **Conclusion**:
- The correct answer to the question is **Mucor**, as it is a representative of Phycomycetes that exhibits multinucleate, aseptate mycelium and produces oospores as sexual spores.

### Final Answer:
**Mucor**