The simplest of oxygen producting photosynthetic organisms are____________?

Explanation

Cyanobacteria are among the simplest organisms that perform oxygenic photosynthesis, using light energy to split water and releasing oxygen. They are prokaryotes, unlike algae and Chlamydomonas, which are eukaryotic photosynthetic organisms. Students may choose a because algae are often introduced as simple photosynthetic organisms, but cyanobacteria are structurally simpler.