Dust-bin group of fungi is :

Options

A. Ascomycetes
B. Deuteromycetes
C. Zygomycetes
D. Basidiomycetes

Answer

To determine which group of fungi is referred to as the "dust-bin group," we can analyze the given options step by step.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which group of fungi is commonly known as the "dust-bin group."

2. **Evaluate the First Option - Ascomycetes**:
- Ascomycetes are known as "sac fungi" and are characterized by their sexual reproduction through ascospores.
- Since they reproduce sexually, they do not fit the description of the "dust-bin group."
- **Conclusion**: This option is incorrect.

3. **Evaluate the Second Option - Deuteromycetes**:
- Deuteromycetes, also known as "Fungi Imperfecti," are fungi that primarily reproduce asexually and do not have a known sexual stage.
- Due to their lack of a defined sexual reproduction phase, they are often referred to as the "dust-bin group" of fungi, as they do not fit neatly into the other classifications.
- **Conclusion**: This option is correct.

4. **Evaluate the Third Option - Zygomycetes**:
- Zygomycetes are known as "conjugation fungi" and reproduce sexually through the formation of zygospores.
- Since they reproduce sexually, they do not belong to the "dust-bin group."
- **Conclusion**: This option is incorrect.

5. **Evaluate the Fourth Option - Basidiomycetes**:
- Basidiomycetes are known as "club fungi" and reproduce sexually through basidiospores.
- Similar to Ascomycetes and Zygomycetes, they do not fit the description of the "dust-bin group."
- **Conclusion**: This option is incorrect.

### Final Answer:
The correct answer is **Deuteromycetes**, as they are commonly referred to as the "dust-bin group" of fungi.

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