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 the specialized cells found in cyanobacteria or 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 a group of photosynthetic bacteria found in the kingdom Monera.

2. **Understand the Function of Specialized Cells**: Cyanobacteria have specialized cells that play a crucial role in their survival and functionality, particularly in nitrogen fixation.

3. **List the Types of Specialized Cells**: Some of the specialized cells found in cyanobacteria include:
- Heterocysts
- Aplanospores
- Kinetes
- Zoospores

4. **Focus on Nitrogen Fixation**: Among these specialized cells, heterocysts are specifically adapted for nitrogen fixation. They provide an anaerobic environment for the enzyme nitrogenase, which is necessary for converting atmospheric nitrogen into a usable form for the organism.

5. **Select the Correct Answer**: Based on the function of these specialized cells, the correct answer to the question is "heterocyst".

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

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