The pigment in blue-green algae is _____ which is the same as the one found in green plants. These blue-green algae are _______.

Step-by-step solution

The question signals towards the similarity with green plants which have the green photosynthetic pigment. The organisms who produce their own food and energy using light & carbon-di-oxide are known as Photoautotrophs. Hence, Cyanobacteria which contains Chlorophyll is capable of producing its food & energy and in turn releasing oxygen in the atmosphere.