Cyanobacteria comes under Eubacteria. They are prokaryotic,free living and autotrophic organisms.

Cyanobacteria Classification

Cyanobacteria are a group of photosynthetic bacteria that are capable of producing oxygen through photosynthesis. They are often referred to as blue-green algae, but they are not actually algae. Cyanobacteria are prokaryotes, which means they lack a nucleus and other membrane-bound organelles. They are classified under the domain Bacteria and the kingdom Monera.

Eubacteria Classification

Eubacteria, also known as true bacteria, are a diverse group of prokaryotic organisms that are found in various habitats. They are classified under the domain Bacteria and the kingdom Monera. Eubacteria include a wide range of bacteria, such as those found in soil, water, and the human body. They can be further classified into different phyla based on their characteristics and genetic makeup.

Difference between Cyanobacteria and Eubacteria

1. Cellular Structure: Cyanobacteria have a prokaryotic cellular structure, lacking a nucleus and membrane-bound organelles. On the other hand, eubacteria also have a prokaryotic cellular structure.

2. Pigmentation: Cyanobacteria contain pigments such as chlorophyll a, phycocyanin, and phycoerythrin, which allow them to carry out photosynthesis. Eubacteria do not have specialized pigments for photosynthesis.

3. Habitat: Cyanobacteria are commonly found in aquatic environments, including freshwater and marine habitats. They can also be found in terrestrial habitats, such as soil and rocks. Eubacteria have a wider range of habitats, including soil, water, plants, animals, and even extreme environments like hot springs and deep-sea hydrothermal vents.

4. Oxygen Production: Cyanobacteria are known for their ability to produce oxygen through photosynthesis. They played a crucial role in the evolution of Earth's atmosphere by producing oxygen as a byproduct. Eubacteria do not have the same capacity to produce oxygen through photosynthesis.

Cyanobacteria and Algae

While cyanobacteria are often called blue-green algae, they are not actually algae. Algae are eukaryotic organisms that can be found in a variety of habitats, including aquatic environments. They have a more complex cellular structure compared to cyanobacteria, with a true nucleus and other membrane-bound organelles. Algae are classified under different kingdoms, depending on their characteristics, such as the kingdom Plantae for green algae.

Conclusion

In conclusion, cyanobacteria are prokaryotic bacteria classified under the domain Bacteria and the kingdom Monera. They are distinct from eubacteria and algae in terms of cellular structure, pigmentation, habitat, and oxygen production. While cyanobacteria share some characteristics with algae, they are not classified as algae due to their prokaryotic nature.