Prokaryote that is considered as source of SCP is

Options

A. Rhizobium
B. Frankia
C. Streptococcus
D. Spirulina

Answer

To solve the question "Prokaryote that is considered as source of SCP is," we need to identify which of the given options is a prokaryote that can be classified as a source of Single Cell Protein (SCP).

### Step-by-Step Solution:

1. **Understanding SCP**:
- SCP stands for Single Cell Protein, which refers to protein derived from the cells of microorganisms.
- Microorganisms that can produce SCP include bacteria, yeast, fungi, and algae.

2. **Analyzing the Options**:
- **Option 1: Rhizobium**: This is a genus of bacteria known for nitrogen fixation in legumes. It is not primarily known for SCP.
- **Option 2: Francia**: Similar to Rhizobium, Francia is also involved in nitrogen fixation and is not a source of SCP.
- **Option 3: Streptococcus**: This is a genus of bacteria that includes many pathogenic species and is not known for SCP production.
- **Option 4: Spirulina**: This is a type of cyanobacteria (often referred to as blue-green algae) that is widely recognized as a source of SCP due to its high protein content.

3. **Conclusion**:
- After evaluating all the options, the only prokaryote that is considered a source of Single Cell Protein is **Spirulina**.

### Final Answer:
The prokaryote that is considered as a source of SCP is **Spirulina**.

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