In which group of fungi, conidia are produced exogenously on conidiophores?

Options

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

Answer

To solve the question of which group of fungi produces conidia exogenously on conidiophores, we can analyze the options provided step by step:

### Step 1: Understand the types of fungi
We have four groups of fungi to consider:
1. Ascomycetes
2. Phycomycetes
3. Deuteromycetes
4. Basidiomycetes

### Step 2: Analyze Ascomycetes
- Ascomycetes, commonly known as sac fungi, can be unicellular (like yeast) or multicellular (like Penicillium).
- They reproduce asexually by producing conidia, which are formed exogenously on specialized structures called conidiophores.
- Examples include Aspergillus and Neurospora.

### Step 3: Analyze Phycomycetes
- Phycomycetes reproduce asexually through zoospores and aplanospores.
- They do not produce conidia, so this option is incorrect.

### Step 4: Analyze Deuteromycetes
- Deuteromycetes, also known as imperfect fungi, lack a known sexual reproduction stage.
- They primarily reproduce asexually, but they do not produce conidia exogenously on conidiophores.
- Thus, this option is also incorrect.

### Step 5: Analyze Basidiomycetes
- Basidiomycetes include fungi like mushrooms and puffballs.
- They typically do not produce asexual spores; instead, they reproduce through basidiospores formed on a structure called a basidium.
- Therefore, this option is incorrect as well.

### Conclusion
After analyzing all the options, we conclude that the group of fungi that produces conidia exogenously on conidiophores is **Ascomycetes**.

### Final Answer
**Ascomycetes**

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