Respiration can occur in the absence of oxygen in

Options

A. Salanum tuberosum
B. Spirogyra
C. Yeast
D. Homo sapiens

Answer

**Step-by-Step Solution:**

1. **Understanding Respiration**: Respiration is a biochemical process that occurs in living organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. It can occur in two main forms: aerobic (with oxygen) and anaerobic (without oxygen).

2. **Identifying Anaerobic Respiration**: Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It involves the partial breakdown of organic compounds and releases a smaller amount of energy compared to aerobic respiration.

3. **Analyzing the Options**: The question provides several options:
- Selenum tuberosum (potato)
- Spirogyra (a type of green algae)
- Yeast
- Homo sapiens (humans)

4. **Evaluating Each Option**:
- **Selenum tuberosum**: This organism requires oxygen for respiration, thus it does not perform anaerobic respiration.
- **Spirogyra**: This organism primarily conducts photosynthesis and aerobic respiration, so it also does not perform anaerobic respiration.
- **Yeast**: Yeast is a microorganism that can perform anaerobic respiration through a process called fermentation. This is a key characteristic of yeast.
- **Homo sapiens**: Humans require oxygen for respiration and do not perform anaerobic respiration.

5. **Conclusion**: Based on the analysis, the only organism from the options that can perform respiration in the absence of oxygen is **yeast**.

6. **Final Answer**: Respiration can occur in the absence of oxygen in **yeast**.

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