According to evolutionary theory, the cell on the right appeared first. were among the first photosynthetic forms of this organism.

cyanobacteria

Explanation:

Cyanobacteria are considered one of the first photosynthetic life forms on the planet. They are estimated to have appeared approximately three billion years ago. Given the date of fossils that prove the existence of this organism in primitive times, it is believed that cyanobacteria were the main responsible for releasing oxygen in our atmosphere, making the earth a habitable planet.

explanation:

codominace both parental allels can be observed in the offspring

dominance neither parental allels can be observed in the offspring