Oxygen enters amoeba through _________

Explanation

**Step-by-Step Solution:**

1. **Understanding Amoeba**: Amoeba is a unicellular organism, meaning it consists of a single cell. This cell performs all necessary life processes, including respiration.

2. **Respiration in Amoeba**: In amoeba, respiration refers to the process of gas exchange, where oxygen is taken in and carbon dioxide is expelled.

3. **Role of the Cell Membrane**: The cell membrane of the amoeba plays a crucial role in this process. It is semi-permeable, allowing certain substances to pass through while blocking others.

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