What organisms existed in Precambrian?

During the Precambrian, which encompasses roughly 88% of Earth's history, a variety of simple organisms emerged. The earliest life forms included prokaryotic microorganisms such as bacteria and archaea, with evidence of stromatolites indicating photosynthetic cyanobacteria. Multicellular life began to appear later in the Ediacaran period, with soft-bodied organisms like the Ediacaran biota. Overall, the Precambrian was characterized by the gradual evolution of life from simple unicellular organisms to more complex multicellular forms.