Peritrichous bacteria have flagella

Options

A. At two ends
B. At one end
C. All over
D. None.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the position of flagella in peritrichous bacteria. We need to determine where the flagella are located on these bacteria.

2. **Categorization of Bacteria**: Bacteria can be categorized based on the presence or absence of flagella. There are two main groups:
- **Flagellated Bacteria**: These bacteria have flagella.
- **Non-Flagellated Bacteria**: These bacteria do not have flagella.

3. **Types of Flagellated Bacteria**: Flagellated bacteria can be further classified into several types based on the arrangement of flagella:
- **A-trichus**: No flagella.
- **Monotrichus**: A single flagellum at one end.
- **Amphitrichus**: A single flagellum at both ends.
- **Lophotrichus**: A tuft of flagella at one end.
- **Peritrichous**: Multiple flagella distributed all over the surface of the bacterial cell.

4. **Identifying Peritrichous Bacteria**: In peritrichous bacteria, flagella are not localized to one or both ends but are instead present all over the surface of the bacterial cell.

5. **Conclusion**: Based on the classification, the correct answer to the question is that peritrichous bacteria have flagella **all over** their surface.

### Final Answer:
The correct option is **C: all over**.