Common-shaped bacteria are

Options

A. Bacilli
B. Spirilla
C. Vibros
D. Cocci

Answer

To answer the question about the common-shaped bacteria, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Shapes of Bacteria**: Bacteria can be classified based on their shapes into several categories. The main shapes include:
- Spherical (cocci)
- Rod-shaped (bacilli)
- Spiral (spirilli)
- Comma-shaped (vibrios)
- Corkscrew-shaped (spirochaetes)

2. **Focus on the Given Shape**: The question specifically asks about "common-shaped bacteria," which refers to the comma shape.

3. **Determine the Correct Classification**: Among the options provided (bacilli, spirilli, vibros, cocci), we need to identify which one corresponds to the comma shape.
- Bacilli are rod-shaped.
- Spirilli are spiral-shaped.
- Cocci are spherical.
- Vibrios are indeed comma-shaped.

4. **Conclude the Answer**: Based on the classification, the common-shaped bacteria that are comma-shaped are called **vibrios**.

### Final Answer:
The common-shaped bacteria are called **vibrios**.

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