Which one of the following has least similar characters ?

Options

A. family
B. Class
C. Genus
D. Species

Explanation

To solve the question "Which one of the following has least similar characters?" we need to analyze the taxonomic hierarchy and the options provided.

### Step-by-Step Solution:

1. **Understand Taxonomic Hierarchy**: Taxonomy is the science of classification of living organisms. The hierarchy from the broadest to the most specific categories is as follows: Domain > Kingdom > Phylum > Class > Order > Family > Genus > Species.

2. **Identify the Options**: The options given are:
- Family
- Class
- Genus
- Species

3. **Analyze Similarity in Taxonomic Levels**:
- **Species**: This is the most specific category and organisms within the same species share the most similar characteristics.
- **Genus**: A group of closely related species. Organisms in the same genus share more similarities than those in a higher taxonomic category.
- **Family**: A group of related genera. Organisms in the same family share fewer similarities compared to those in the same genus.
- **Class**: This is a higher taxonomic category that encompasses multiple orders. Organisms in the same class can be quite different from one another.

4. **Determine the Least Similar Characters**: Since the question asks for the option with the least similar characters, we look for the highest taxonomic category among the options. The class is broader and includes many different families, orders, and genera, resulting in a greater diversity of characteristics.

5. **Conclusion**: The option that has the least similar characters is **Class** (Option B).

### Final Answer: B, Class

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