Yeasts are ..........celled

Explanation

**Step-by-Step Solution:**

1. **Identify the Classification of Yeasts**: Yeasts belong to the Kingdom Fungi. This is the first step in understanding their biological classification.

2. **Understand the Characteristics of Fungi**: The organisms in the Kingdom Fungi are primarily eukaryotic, meaning their cells have a defined nucleus and membrane-bound organelles.

3. **Differentiate Yeasts from Other Fungi**: While many fungi are multicellular (like mushrooms), yeasts are unique in that they are unicellular organisms. This means they consist of a single cell.

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