one of the following organisms can live without the oxygen of air. This organisms is:

Options

A. amoeba
B. yak
C. yeast
D. leech

Answer

**Step-by-Step Solution:**

1. **Understand the Types of Organisms:**
- There are two main types of organisms based on their oxygen requirements: aerobic organisms and anaerobic organisms.
- Aerobic organisms require oxygen for respiration, while anaerobic organisms can survive without oxygen.

2. **Identify Examples of Aerobic Organisms:**
- Examples of aerobic organisms include amoeba, yak, and leech. These organisms depend on oxygen for their respiration process.

3. **Understand Anaerobic Organisms:**
- Anaerobic organisms can thrive in environments devoid of oxygen. They perform respiration through different biochemical pathways.

4. **Identify an Anaerobic Organism:**
- Yeast is an example of an anaerobic organism. It is a unicellular fungus that can perform fermentation in the absence of oxygen.

5. **Explain Yeast's Process:**
- In anaerobic conditions, yeast converts pyruvate into alcohol and carbon dioxide, allowing it to generate energy without using oxygen.

6. **Conclusion:**
- Therefore, the organism that can live without the oxygen of air is yeast.

**Final Answer:** Yeast

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