_________ is an assemblage of related classes.

Explanation

To answer the question, "_________ is an assemblage of related classes," we need to understand the hierarchical classification system in biology. Here’s a step-by-step breakdown:

1. **Understand Biological Classification**: Biological classification is a system used to organize and categorize living organisms into groups based on shared characteristics.

2. **Know the Hierarchical Levels**: The classification system follows a specific hierarchy, which includes the following levels:
- Kingdom
- Phylum
- Class
...