Name one animal each which reproduces by binary fission.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Binary Fission**: Binary fission is a type of asexual reproduction where a single organism divides into two identical daughter cells. This process involves the duplication of the organism's genetic material followed by the division of the cell.

2. **Identifying Organisms**: To answer the question, we need to identify animals that reproduce by binary fission. This method of reproduction is commonly found in certain unicellular organisms.

3. **Examples of Animals**:
- **Bacteria**: Bacteria are one of the simplest forms of life and reproduce by binary fission. For instance, *Escherichia coli* (E. coli) is a common example of a bacterium that reproduces this way.
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