Blue green algae do not have flagella or cilia but they have the capacity to move. How is this function performed ?

Options

A. By means of musculature
B. By rotation and gliding
C. By means of fimbria
D. By means of special organs

Answer

**Step-by-Step Solution:**

1. **Understanding Blue Green Algae**: Blue green algae, also known as cyanobacteria, are a group of photosynthetic bacteria that can perform nitrogen fixation. They are prokaryotic organisms and lack membrane-bound organelles.

2. **Locomotion in Organisms**: Typically, organisms move using locomotory organs such as flagella or cilia. Flagella are long, whip-like structures, while cilia are shorter and more numerous. Both structures help in movement.

3. **Absence of Flagella and Cilia**: Blue green algae do not possess flagella or cilia, which raises the question of how they can move despite this absence.

4. **Mechanisms of Movement**: Blue green algae exhibit movement through two primary mechanisms:
- **Rotation**: They can rotate their bodies, which allows them to change position in the water.
- **Gliding**: They can glide over surfaces, which helps them to move through their environment.

5. **Musculature and Fimbria**:
- The term "musculature" refers to muscle tissues, which blue green algae do not have, so this option is incorrect.
- Fimbria are hair-like structures that help in attachment rather than locomotion, thus they do not contribute to movement.

6. **Conclusion**: The movement of blue green algae is primarily due to the rotation and gliding of their bodies, rather than any specialized locomotory structures.

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