Binomial nomenclature means writing the names of organisms in two words denoting their :

Options

A. genus and species
B. species and races
C. genus and family
D. none of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Binomial Nomenclature**: Binomial nomenclature is a system used in biology to name organisms using two words. This system helps in identifying and classifying living things.

2. **Identifying the Components**: The two words in binomial nomenclature represent specific categories:
- The first word is the **genus** name, which groups together species that are closely related.
- The second word is the **species** name, which identifies the specific organism within that genus.

3. **Analyzing the Options**:
- **Option 1: Genus and Species**: This option correctly identifies the two components of binomial nomenclature.
- **Option 2: Species and Races**: This option is incorrect because "races" is not a term used in binomial nomenclature; it typically refers to human classifications.
- **Option 3: Genus and Family**: This option is also incorrect as "family" is a higher taxonomic rank that groups multiple genera.
- **Option 4: None of These**: This option is incorrect since option 1 is valid.

4. **Conclusion**: Based on the definitions and analysis of the options, the correct answer is **Option 1: Genus and Species**.

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