Fungi imperfecti is a group of fungi which

Options

A. Do not have a sexual phase
B. Includer Toadstool and Puffball
C. Have specise that prey upon some nematodes
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Fungi Imperfecti**:
- Fungi Imperfecti, also known as Deuteromycetes, is a group of fungi characterized by the absence of a sexual reproductive phase in their life cycle.

2. **Identifying Characteristics**:
- These fungi reproduce asexually through conidia or other vegetative means. The sexual forms, when discovered, are reclassified into other fungal groups.

3. **Examples of Fungi Imperfecti**:
- Common examples include Alternaria, Colletotrichum, and Trichoderma. These fungi are known for their asexual reproduction.

4. **Analyzing the Options**:
- The options provided are:
- A) Do not have a sexual phase
- B) Include Toadstool and Puffball
- C) Have species that prey upon some nematodes
- D) All the above
- Option A is correct because Fungi Imperfecti indeed do not have a sexual phase.

5. **Eliminating Incorrect Options**:
- Option B is incorrect because Toadstools and Puffballs belong to the group Basidiomycetes, not Fungi Imperfecti.
- Option C is also incorrect as Fungi Imperfecti do not have species that prey upon nematodes.
- Therefore, option D (All the above) is also incorrect.

6. **Conclusion**:
- The correct answer is that Fungi Imperfecti is a group of fungi that do not have a sexual phase.

### Final Answer:
Fungi Imperfecti is a group of fungi which do not have a sexual phase.

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