Cyanobacteria or blue – green algae contain some specialized cells , known as ………….. .

Options

A. Akinetes
B. Heterocyst
C. Aplanosopore
D. Zoospores

Answer

To solve the question regarding specialized cells in cyanobacteria (blue-green algae), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that cyanobacteria are also known as blue-green algae. They are photosynthetic prokaryotes.

2. **Understand the Function**: Cyanobacteria are known for their ability to fix atmospheric nitrogen, which is an essential process for converting nitrogen gas into a form usable by living organisms.

3. **Specialized Cells**: In cyanobacteria, the process of nitrogen fixation occurs in specialized cells.

4. **Name the Specialized Cells**: The specialized cells responsible for nitrogen fixation in cyanobacteria are called **heterocysts**.

5. **Conclusion**: Therefore, the answer to the question is that cyanobacteria or blue-green algae contain specialized cells known as **heterocysts**.

### Final Answer:
Cyanobacteria or blue-green algae contain some specialized cells, known as **heterocysts**.

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