The nonmycelial unicellular ascomycetes having no fruiting bodies are known as

Options

A. Yeasts
B. Blue moulds
C. Lichens
D. Mushrooms

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a specific type of fungi that is non-mycelial, unicellular, and belongs to the group Ascomycetes, while also lacking fruiting bodies.

2. **Identifying Key Characteristics**:
- **Non-mycelial**: This means that the organism does not form a mycelium, which is a network of filaments (hyphae) typical of many fungi.
- **Unicellular**: The organism is made up of a single cell.
- **Ascomycetes**: This is a class of fungi known for producing spores in a sac-like structure called an ascus.
- **No Fruiting Bodies**: This indicates that the organism does not have specialized structures for reproduction, which are often seen in multicellular fungi.

3. **Analyzing Options**:
- **Yeast**: Yeasts are unicellular fungi that belong to the Ascomycetes class. They do not form mycelium and do not have fruiting bodies. They can be aerobic or anaerobic and are commonly used in fermentation processes.
- **Blue Molds**: These are multicellular fungi and do have mycelium, so they do not fit the criteria.
- **Lichen**: Lichens are a symbiotic association between fungi and algae or cyanobacteria, not a single type of fungus.
- **Mushroom**: Mushrooms are multicellular fungi that have fruiting bodies, which disqualifies them from being the answer.

4. **Conclusion**: Based on the analysis, the only organism that fits all the criteria of being non-mycelial, unicellular, belonging to Ascomycetes, and lacking fruiting bodies is **yeast**.

5. **Final Answer**: The non-mycelial unicellular ascomycetes having no fruiting bodies are known as **yeast**.

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