Stromatolites were first seen in the Precambrian and have survived ever since.
They are the longst survieving living thing. The photo at Hemillin pool ,Shark Bayin Western Australia. Shot by Dr.Prot.
Proterozoic comes from the Greek meaning 'early life'. This name recognie het life formed through much of the Precambrian, although little is nown about it.
The earliest life forms were simpelled organisms, such as algae.
The main concentrations of these algaeare as stromatlites, dome-shaped towers or mats of algae built one upon the other.
Stromatrlites are the longest sviving example, of life on earth forming but 3.5 bilion years ago, and still forming today at for example, above photo area.
Evoltion was slow in these early times, but,by the late Precambrian, fungi, algae, and simple organisms called protoo existed evrywhere on earth. By 700 millin years ago, some of the algae had developed into complex forms, such as seaweads and simple animals such as jellyfish and worms had evolve.
All of these early animals were soft bodied and have left on rare traces. This is why people originaly thought that the Precambrian was devoid of life. It was only when the animals evelved hard hells that they began to leave the remains that are so abundant in the Cambrian Period.