On the basis of different shapes, bacteria are grouped under

Options

A. 2 Categories
B. 3 Categories
C. 5 Categories
D. 4 Categories

Answer

To answer the question about how bacteria are grouped based on different shapes, we can follow these steps:

### Step 1: Identify the Shapes of Bacteria
Bacteria are classified into several categories based on their shapes. The primary shapes include:
1. **Cocci** - Spherical bacteria
2. **Bacilli** - Rod-shaped bacteria
3. **Vibrios** - Comma-shaped bacteria
4. **Spirilla** - Spiral-shaped bacteria
5. **Spirochetes** - Corkscrew-shaped bacteria

### Step 2: Count the Categories
From the identified shapes, we can count the total number of categories:
- Cocci
- Bacilli
- Vibrios
- Spirilla
- Spirochetes

This gives us a total of **5 categories**.

### Step 3: Provide Examples for Each Shape
To better understand and remember these categories, we can associate an example with each shape:
- **Cocci**: Example - Staphylococcus
- **Bacilli**: Example - Escherichia coli (E. coli)
- **Vibrios**: Example - Vibrio cholerae
- **Spirilla**: Example - Spirillum minus
- **Spirochetes**: Example - Treponema pallidum

### Conclusion
Based on the classification of bacteria by their shapes, we conclude that bacteria are grouped into **5 categories**.

### Final Answer
The answer is **5 categories**.

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