Mark the incorrect statement for Deuteronomycetes.

Options

A. Commonly known as imperfect fungi
B. The mycelium is septate and branched
C. Large number of them are decomposers
D. Sexual reproduction through syngamy.

Answer

To solve the question regarding Deuteromycetes and identify the incorrect statement, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Deuteromycetes**:
- Deuteromycetes, also known as imperfect fungi, are a class of fungi that primarily reproduce asexually.

2. **Analyze the Options**:
- **Option 1**: "Commonly known as imperfect fungus."
- This statement is **correct**. Deuteromycetes are indeed referred to as imperfect fungi due to their lack of a known sexual reproduction stage.

- **Option 2**: "The mycelium is septate and branched."
- This statement is also **correct**. The mycelium of Deuteromycetes is characterized by being septate (having cross-walls) and branched.

- **Option 3**: "A large number of them are decomposers."
- This statement is **correct** as well. Many Deuteromycetes play a crucial role in the ecosystem as decomposers.

- **Option 4**: "Sexual reproduction through syngamy."
- This statement is **incorrect**. Deuteromycetes do not reproduce sexually; they primarily reproduce asexually and do not have a known sexual reproductive phase.

3. **Conclusion**:
- The incorrect statement regarding Deuteromycetes is **Option 4**: "Sexual reproduction through syngamy."