Name the basic unit of biological classification.

Explanation

### Step-by-Step Solution:

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

2. **Identifying the Basic Unit**: The question asks for the basic unit of this classification system. In biology, the fundamental unit of classification is known as a "species."

3. **Definition of Species**: A species is defined as a group of individuals that share similar morphological characteristics and can interbreed. This means that members of the same species can reproduce with one another, but they are reproductively isolated from members of other species.

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