Why are some fungi grouped under "fungi imperfecti'?

Explanation

**Step-by-Step Solution:**

1. **Understanding Fungi Classification**: Fungi are classified into two main categories: perfect fungi and imperfect fungi. This classification is based on their reproductive methods.

2. **Definition of Fungi Imperfecti**: Fungi imperfecti, also known as Deuteromycetes, are a group of fungi that do not fit into the standard taxonomical classification because they lack a known sexual reproductive stage.

3. **Reproductive Methods**:
- **Perfect Fungi**: These fungi can reproduce both sexually and asexually. They have a complete life cycle that includes both forms of reproduction.
...