Bacteriophages kill

Options

A. Fungi
B. All monerans
C. Bacteria
D. Viruses.

Answer

**Step-by-Step Solution:**

1. **Understanding Bacteriophages**: Bacteriophages, often referred to as phages, are viruses that specifically infect and kill bacteria. They are not capable of infecting plants or animals.

2. **Classification of Viruses by Host**: Viruses can be classified based on the type of host they infect:
- **Phytophages**: Viruses that infect plants.
- **Zoophages**: Viruses that infect animals.
- **Bacteriophages**: Viruses that infect bacteria.
- **Coliphages**: A specific type of bacteriophage that infects *Escherichia coli* (E. coli).
- **Phycophages**: Viruses that infect algae.
- **Mycophages**: Viruses that infect fungi.

3. **Identifying the Correct Answer**: The question asks which organisms bacteriophages kill. Since bacteriophages specifically target bacteria, the correct answer is that bacteriophages kill bacteria.

4. **Eliminating Incorrect Options**:
- Bacteriophages do not kill viruses (since they are viruses themselves).
- They do not kill fungi (which are targeted by mycophages).
- They do not infect plants or animals (which are targeted by phytophages and zoophages, respectively).

5. **Conclusion**: Therefore, the only correct answer is that bacteriophages kill bacteria.

**Final Answer**: Bacteriophages kill bacteria.

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