Which class of fungi is called 'Fungi Imperfecti?

Options

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

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the class of fungi known as 'Fungi Imperfecti'.

2. **Reviewing the Options**: The options provided are:
- A. Ascomycetes
- B. Deuteromycetes
- C. Basidiomycetes
- D. Zygomycetes

3. **Analyzing Each Option**:
- **Ascomycetes**: This class of fungi is known for producing sexual spores in a specialized structure called an ascus. It does not fit the description of 'Fungi Imperfecti'.
- **Deuteromycetes**: This class is specifically referred to as 'Fungi Imperfecti' because it primarily reproduces asexually and does not have a known sexual reproductive stage. They produce asexual spores called conidia.
- **Basidiomycetes**: This class includes fungi that reproduce sexually through the formation of club-shaped structures called basidia, which produce basidiospores. This is not 'Fungi Imperfecti'.
- **Zygomycetes**: These fungi are known for their sexual reproduction through the formation of zygospores. They do not correspond to 'Fungi Imperfecti'.

4. **Conclusion**: The correct answer is **B. Deuteromycetes**, as it is the class of fungi known as 'Fungi Imperfecti'.

---