Enlist two similarities between a mitochondrion and a bacterium.

Explanation

**Solution:**

1. **Presence of a Membrane**: Both mitochondria and bacteria are surrounded by a cell membrane. Mitochondria have their own double membrane structure, similar to the single membrane structure found in prokaryotic bacteria. This membrane serves as a barrier that separates the internal environment of the organelle or cell from the external environment.

2. **Circular DNA**: Both mitochondria and bacteria contain circular DNA. Mitochondria possess their own DNA, which is similar in structure to bacterial DNA, as both are circular in shape. This characteristic is a key feature of prokaryotic organisms, including bacteria, and is also found in the mitochondria, which suggests an evolutionary relationship.

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