which of the following is not a member of fungi imperfecti?

Options

A. colletotrichum
B. cercospora
C. neurospora
D. alternaria

Answer

To solve the question "Which of the following is not a member of fungi imperfecti?", we will analyze each option provided:

### Step-by-Step Solution:

1. **Understanding Fungi Imperfecti**:
- Fungi imperfecti, also known as Deuteromycetes, are a class of fungi characterized by the absence of a sexual reproductive stage. They primarily reproduce asexually.

2. **Analyzing the Options**:
- **Option A: Colletotrichum**
- Colletotrichum is known to lack a sexual stage and reproduces asexually. Therefore, it is a member of fungi imperfecti.

- **Option B: Cercospora**
- Cercospora also does not have a sexual reproductive stage and reproduces asexually, making it a member of fungi imperfecti.

- **Option C: Neurospora**
- Neurospora is unique among the options as it has been observed to reproduce both asexually and sexually. Therefore, it does not belong to fungi imperfecti.

- **Option D: Alternaria**
- Alternaria, like Colletotrichum and Cercospora, does not have a sexual stage and reproduces asexually, categorizing it as a member of fungi imperfecti.

3. **Conclusion**:
- Based on the analysis, the only organism that is not a member of fungi imperfecti is **Neurospora**.

### Final Answer:
**Neurospora** is not a member of fungi imperfecti.

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