Which of the following is not an example of imperfect fungi ?

Options

A. Alternaria
B. Claviceps
C. Trichoderma
D. Colletotrichum

Answer

To solve the question "Which of the following is not an example of imperfect fungi?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Imperfect Fungi**:
- Imperfect fungi are classified under the group known as Deuteromycetes. These fungi primarily reproduce asexually and do not have a known sexual reproduction phase.

2. **Identify Characteristics of Imperfect Fungi**:
- They are characterized by their asexual reproduction methods.
- The sexual phase of these fungi is not observed or documented.

3. **List Common Examples of Imperfect Fungi**:
- Examples include:
- **Trichoderma**: A genus of fungi known for its asexual reproduction.
- **Colletotrichum**: Another genus that reproduces asexually and falls under imperfect fungi.

4. **Identify the Options Given**:
- The question will provide multiple options, one of which is not an imperfect fungus. We need to analyze these options.

5. **Evaluate Each Option**:
- If an option represents a fungus that has a known sexual reproduction phase, it would not be classified as an imperfect fungus.
- For instance, **Claviceps** is a genus that has a known sexual reproduction phase and is therefore not classified as an imperfect fungus.

6. **Select the Correct Answer**:
- Based on the evaluation, the option that represents a fungus with a known sexual phase (like Claviceps) is the correct answer to the question.

### Final Answer:
The fungus that is not an example of imperfect fungi is **Claviceps**.

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