The world's first photosynthetic organisms were also the first to adapt to intertidal zones. What is the name of the group that includes these organisms?

Question

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Cyanobacteria, also known as blue-green algae, were among the first photosynthetic organisms on Earth and played a crucial role in the development of the planet's oxygen atmosphere. They are known to have adapted to various environments, including intertidal zones.

The World's First Photosynthetic Organisms Were Also the First to Adapt