Question

The first simple, one-celled organisms that developed during the Precambrian era are called _____.

Answer 1

it is a unicellular

Step-by-step explanation:

Answer 2

The Eubacteria was the first form of life; it was a prokaryotic, or single-celled, primitive bacteria. Bacterial microfossils are the earliest known fossils. There were also stromatolites, or microbial growth structures possibly created by eukaryotes, which may have begun to develop during this era.