Define a taxon. Give some examples of taxa at different hierarchical levels.

Explanation

**Step-by-Step Solution:**

1. **Definition of Taxon:**
- A taxon is defined as a particular level of hierarchy in the classification of living organisms. It represents a group of one or more organisms or populations that are recognized by taxonomists as forming a unit.

2. **Hierarchical Levels of Taxa:**
- Taxa are organized into a hierarchical system, which includes several levels. Here are examples of taxa at different hierarchical levels:
- **Species:** This is the basic level of classification. For example, *Homo sapiens* (humans).
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