The class of fungi in which asexual spores are exogenous (conidia) and sexual spores are endogenous

Options

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

Answer

To solve the question regarding the class of fungi in which asexual spores are exogenous (conidia) and sexual spores are endogenous, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- Asexual spores are produced without sexual reproduction and can be exogenous (formed outside) or endogenous (formed inside).
- Sexual spores are produced through sexual reproduction and can also be exogenous or endogenous.

2. **Analyze the Options**:
- **Option A: Phycomycetes**: In phycomycetes, asexual spores are produced endogenously, which does not fit the requirement of the question.
- **Option B: Ascomycetes**: Known as sac fungi, ascomycetes produce asexual spores (conidia) exogenously and sexual spores endogenously. This fits the criteria given in the question.
- **Option C: Basidiomycetes**: In basidiomycetes, asexual spores are produced exogenously, but sexual spores are also produced exogenously, which does not meet the requirement.
- **Option D: Deuteromycetes**: Also known as imperfect fungi, deuteromycetes primarily reproduce asexually and do not have a known sexual reproduction phase, making this option incorrect.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option B: Ascomycetes**. This class of fungi produces asexual spores exogenously (conidia) and sexual spores endogenously.

### Final Answer:
**The class of fungi in which asexual spores are exogenous (conidia) and sexual spores are endogenous is Ascomycetes.**

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