The taxon refers to a taxonomic grouping of ...........

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Taxon":**
- A taxon is a group of one or more populations of an organism or organisms that form a unit in the biological classification system.

2. **Taxonomic Grouping:**
- Taxa can be classified at different levels, known as taxonomic ranks. These ranks include species, genus, family, order, class, phylum, kingdom, and domain.

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