What animals and plants became extinct during the Precambrian era?

The Precambrian Period lasted for about 4 billion years and ended about 600,000,000 years ago. It is the earliest geological period and is divided into the Archaeozoic and Proterozoic epochs. It was during this time that earliest forms of life were assumed to be just starting off on earth. The fossil record does not extend back that far, but it would be reasonable to assume that some basic plant life and single cell life forms did not evolve any further.