Bacterium reproduces by the process of ________ .

Explanation

**Step-by-Step Solution:**

1. **Identify the Type of Reproduction in Bacteria**: Bacteria primarily reproduce through a process known as asexual reproduction. This means that they do not require a partner to reproduce; instead, a single bacterium can divide to form new individuals.

2. **Understand Asexual Reproduction**: In asexual reproduction, the offspring are genetically identical to the parent organism. This process involves the division of a single parent cell, which leads to the formation of new cells.

3. **Learn About Binary Fission**: The specific method of asexual reproduction in bacteria is called binary fission. In this process, the bacterium grows and then divides into two equal parts.

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