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Difference between Cyanobacteria and Green Algae

Difference between Cyanobacteria and Green Algae

Have you ever seen a pond or lake and noticed that it had a slight green tinge to the water? If so, you were looking at algae. Algae is a type of plant that can be found in both fresh and salt water. There are many different types of algae, but the two most common types are cyanobacteria and green algae. While both types of algae are plants, there are some key differences between them. In this blog post, we will take a closer look at the differences between cyanobacteria and green algae. We will also discuss the benefits and drawbacks of each type of algae.

What is Cyanobacteria?

Cyanobacteria are a type of bacteria that gets their energy through photosynthesis. Cyanobacteria are sometimes called blue-green algae, but they are not algae. Cyanobacteria are prokaryotic cells, which means they do not have a nucleus or other organelles. Cyanobacteria are found in every type of environment, from hot springs to the ocean. Cyanobacteria are important because they produce oxygen gas through photosynthesis. Cyanobacteria were the first organisms on Earth to produce oxygen gas. Cyanobacteria are also used in biotechnology to produce food and biofuels.

What is Green Algae?

Green algae is a type of algae that is classified as a plant. Green algae are found in freshwater and marine environments. Green algae are single-celled or multicellular organisms. Green algae are photosynthetic, meaning they use sunlight to produce food. Green algae are an important food source for many aquatic animals. Green algae are also used in the production of biofuels.

Difference between Cyanobacteria and Green Algae

Cyanobacteria and green algae are often mistaken for one another because they are both aquatic organisms that photosynthesize. However, there are several key differences between the two.

  • Cyanobacteria are prokaryotic, meaning they lack a membrane-bound nucleus. Green algae, on the other hand, are eukaryotic, meaning they have a membrane-bound nucleus. Cyanobacteria are also typically smaller than green algae.
  • Another key difference is that cyanobacteria can form structures called heterocysts, which are specialized cells that can fix nitrogen gas from the atmosphere into a form of nitrogen that can be used by plants.
  • Green algae do not have this ability. Finally, cyanobacteria typically live in saltwater environments, while green algae can be found in both saltwater and freshwater habitats.

Given these distinct characteristics, it is easy to see how cyanobacteria and green algae can be distinguished from one another.


So, what’s the difference between cyanobacteria and green algae? Cyanobacteria are prokaryotes while green algae are eukaryotes. Green algae have cellulose in their cell walls while cyanobacteria do not. Green algae store starch granules in their cytoplasm, but cyanobacteria do not. Finally, the two types of organisms have different methods for photosynthesis- cyanobacteria use phycobilisomes while green algae use chloroplasts. Hopefully, this article has cleared up any confusion about these two microorganisms!

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