Genus is a group of similar and related

Options

A. classes
B. phyla
C. species
D. orders.

Explanation

To answer the question "Genus is a group of similar and related," we will analyze the options provided and derive the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding Classification**:
- In biological classification, organisms are categorized into hierarchical ranks. The main ranks include Kingdom, Phylum, Class, Order, Family, Genus, and Species.

2. **Defining Genus**:
- The genus is a rank in this classification system. It groups together species that are closely related and share common characteristics.

3. **Analyzing the Options**:
- **Classes**: This refers to a higher taxonomic rank that includes multiple orders. It is broader than genus.
- **Phyla**: This is an even broader category that includes multiple classes. It is not related to genus.
- **Species**: This is the most specific rank that refers to individual organisms that can interbreed. Genus is a group of similar species.
- **Orders**: This is a higher rank that includes multiple families, which is also broader than genus.

4. **Identifying the Correct Answer**:
- Since genus is defined as a group of similar and related species, the correct answer to the question is **Species**.

5. **Conclusion**:
- Therefore, the answer to the question "Genus is a group of similar and related" is **Species**.

### Final Answer:
Genus is a group of similar and related **Species**.

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