Which of the following 'suffixes' used for units of classification in plants indicates a taxonomic category of 'family' ?

Options

A. -Ales
B. -Onae
C. -Aceae
D. -Ae

Answer

To determine which suffix indicates a taxonomic category of 'family' in plant classification, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Taxonomic Hierarchy**: Familiarize yourself with the taxonomic hierarchy in biology, which includes categories such as domain, kingdom, phylum, class, order, family, genus, and species.

2. **Identify the Suffixes**: Look at the provided options: ALES, ONI, AC, and AP. We need to identify which of these suffixes is used for the family category.

3. **Research Suffixes**:
- **ALES**: This suffix is typically used for the taxonomic category of 'order'.
- **ONI**: This suffix does not correspond to a widely recognized taxonomic category in plants.
- **AC**: This suffix is commonly used to denote the taxonomic category of 'family' in plant classification.
- **AP**: This suffix does not correspond to a recognized taxonomic category.

4. **Conclusion**: Based on the research, the suffix that indicates the taxonomic category of 'family' in plants is **AC**.

5. **Final Answer**: Therefore, the correct answer is **C (AC)**.