Which of the following pairs of microbes can be grown on nutrient media

Options

A. Viruses and single celled algae
B. Protozoa and viroids
C. Bacteria and fungi
D. Prions and yeast

Answer

To determine which pairs of microbes can be grown on nutrient media, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Nutrient Media**:
- Nutrient media are substances that provide the necessary nutrients for the growth of microorganisms. They typically support the growth of bacteria, fungi, and some protozoa.

2. **Analyzing the Options**:
- **Viruses and Single Cell Algae**:
- Viruses cannot be grown on nutrient media because they are non-living outside a host. They require a living host to replicate.
- Single-cell algae can be grown on nutrient media as they are photosynthetic organisms that can utilize nutrients from the media.
- **Protozoa**:
- Protozoa can be grown on nutrient media. They are eukaryotic microorganisms that thrive in various environments, including nutrient-rich media.
- **Viroids**:
- Viroids are infectious agents composed of RNA and cannot be grown on nutrient media as they also require a host to replicate.
- **Bacteria and Fungi**:
- Both bacteria and fungi can be grown on nutrient media. They are commonly cultured in laboratories for various applications, including research and industrial processes.
- **Prions and Yeast**:
- Prions are misfolded proteins and cannot be grown on nutrient media as they do not have a cellular structure. Yeast, which is a type of fungus, can be grown on nutrient media.

3. **Conclusion**:
- The pairs that can be grown on nutrient media are:
- **Single Cell Algae** (can grow)
- **Protozoa** (can grow)
- **Bacteria and Fungi** (can grow)
- **Yeast** (can grow)
- The most appropriate answer from the options given is **Bacteria and Fungi**.

### Final Answer:
The pair of microbes that can be grown on nutrient media is **Bacteria and Fungi**.

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