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 determine the incorrect statement regarding Deuteromycetes, let's analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Deuteromycetes**:
- Deuteromycetes, also known as "imperfect fungi," are a class of fungi characterized by the absence of a sexual reproductive stage. They reproduce asexually through conidia or other means.

2. **Evaluating the Statements**:
- **Statement 1**: "Commonly known as imperfect fungi."
- This statement is correct. Deuteromycetes are referred to as imperfect fungi due to the lack of sexual reproduction.

- **Statement 2**: "The mycelium is septate and branched."
- This statement is also correct. The mycelium of Deuteromycetes is typically septate (divided by septa) and branched, which aids in nutrient absorption.

- **Statement 3**: "A large number of them are decomposers."
- This statement is correct as well. Many Deuteromycetes play a crucial role in decomposition, breaking down organic matter and recycling nutrients in the ecosystem.

- **Statement 4**: "Sexual reproduction through syngamy."
- This statement is incorrect. Deuteromycetes do not undergo sexual reproduction; they reproduce only asexually.

3. **Conclusion**:
- The incorrect statement regarding Deuteromycetes is the fourth one: "Sexual reproduction through syngamy."