system of classification that employs numerical data to evaluate similarties and differences is known as

Options

A. cytotaxonomy
B. biosystematics
C. phenetics
D. chemotaxonomy

Explanation

To answer the question regarding the system of classification that employs numerical data to evaluate similarities and differences, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a classification system that uses numerical data to assess similarities and differences among organisms.

2. **Analyzing the Options**:
- **Cytotaxonomy**: This system is based on cellular structures. It does not primarily use numerical data.
- **Biosystematics**: This approach studies the genetic evolution of organisms. While it may involve some numerical data, it is not primarily focused on numerical classification.
- **Fanatics**: This system considers observable characteristics and attempts to classify organisms based on these traits. It is known for using numerical data to evaluate similarities and differences.
- **Chemotaxonomy**: This classification is based on the chemical composition of organisms. It does not focus on numerical data for classification.

3. **Identifying the Correct Answer**: Among the options, "fanatics" is the system that employs numerical data to evaluate similarities and differences. Therefore, the correct answer is "fanatics."

### Final Answer:
The system of classification that employs numerical data to evaluate similarities and differences is known as **fanatics**.

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