which of the following are prokaryotes ?
A .protozoa B . Blue- green algae C. fungi D. bacteria

Options

A. A and B
B. B and C
C. A and C
D. B and D

Answer

To determine which of the following options are prokaryotes, we need to understand the characteristics of prokaryotic cells. Prokaryotes are simple, unicellular organisms that lack complex organelles and a defined nucleus.

Let's analyze each option:

1. **Protozoa**:
- Protozoa are eukaryotic organisms. They are more complex than prokaryotes and have a defined nucleus and membrane-bound organelles.
- **Conclusion**: Not a prokaryote.

2. **Blue-green algae**:
- Blue-green algae, also known as cyanobacteria, are considered prokaryotes. They are unicellular and lack a defined nucleus and complex organelles.
- **Conclusion**: This is a prokaryote.

3. **Fungi**:
- Fungi are eukaryotic organisms. They have a defined nucleus and complex organelles.
- **Conclusion**: Not a prokaryote.

4. **Bacteria**:
- Bacteria are classic examples of prokaryotes. They are unicellular and do not have a defined nucleus or complex organelles.
- **Conclusion**: This is a prokaryote.

Based on this analysis, the options that are prokaryotes are:

**B. Blue-green algae and D. Bacteria.**

### Final Answer:
**B. Blue-green algae and D. Bacteria are prokaryotes.**

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