Viruses that infect the bacteria are called____________.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe viruses that specifically infect bacteria.

2. **Identifying the Term**: The term for viruses that infect bacteria is "bacteriophage." This term is derived from the Greek words "bacterion" meaning bacteria and "phagein" meaning to eat or devour.

3. **Explaining Bacteriophages**: Bacteriophages, often referred to as phages, are a type of virus that targets bacteria. They have a unique structure that typically includes a head (which contains the viral nucleic acid) and a tail (which helps in attaching to the bacterial cell).

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