A fungus with coencocytic mycelium develops on moist bread is

Options

A. Rhizopus
B. Albugo
C. Puccinia
D. Alternaria

Answer

To solve the question, "A fungus with coenocytic mycelium develops on moist bread is," we can follow these steps:

### Step 1: Understand the Types of Mycelium
- Mycelium is the network of hyphae (the filamentous structures of fungi).
- There are two types of mycelium:
1. **Coenocytic (or Aseptate) Mycelium**: This type is characterized by continuous tubes filled with multinucleated cytoplasm, meaning there are no septa (cross walls) dividing the hyphae.
2. **Septate Mycelium**: This type has septa that divide the hyphae into distinct cells.

### Step 2: Identify the Fungi Mentioned
- The options given are:
1. **Rhizopus**
2. **Albugo**
3. **Paxinia**
4. **Alternaria**

### Step 3: Analyze Each Option
- **Rhizopus**: Known as bread mold, it has coenocytic mycelium and commonly grows on moist bread.
- **Albugo**: This is a parasitic fungus that does not grow on bread and has septate mycelium.
- **Paxinia**: This fungus also has septate mycelium and is not associated with bread.
- **Alternaria**: Similar to Paxinia, it has septate mycelium and does not grow on bread.

### Step 4: Conclusion
- Based on the analysis, the only fungus that has coenocytic mycelium and develops on moist bread is **Rhizopus**.

### Final Answer
The correct answer is **Rhizopus**.

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