Group bacteria based on shapes with example.

Answer

### Step-by-Step Solution:

1. **Introduction to Bacteria**:
- Bacteria are microorganisms that belong to the Kingdom Monera. They are unicellular and prokaryotic organisms.

2. **Grouping Bacteria by Shape**:
- Bacteria can be categorized based on their shapes into four primary groups.

3. **Coccus-shaped Bacteria**:
- These bacteria are spherical in shape.
- **Examples**:
- *Streptococcus pneumoniae* (causes pneumonia)
- *Streptococcus pyogenes* (causes strep throat)
- *Micrococcus luteus* (found in soil)
- *Staphylococcus aureus* (can cause skin infections)

4. **Bacillus-shaped Bacteria**:
- These bacteria are rod-shaped.
- **Examples**:
- *Bacillus subtilis* (found in soil)
- *Salmonella* (causes food poisoning)
- *Clostridium* (causes botulism)

5. **Vibrio-shaped Bacteria**:
- These bacteria have a comma shape.
- **Example**:
- *Vibrio cholerae* (causes cholera)

6. **Spiral-shaped Bacteria**:
- These bacteria are spiral or corkscrew-shaped.
- **Example**:
- *Treponema pallidum* (causes syphilis)

7. **Conclusion**:
- Bacteria can be classified based on their shapes into coccus, bacillus, vibrio, and spiral, with specific examples for each category.