The Precambrian Era. Basically, the only life present in Earth was that of single-celled bacteria.
frequently had little understanding of working-class life. That is what I think
i cant answer this :(
The Mesozoic Era.
The Mesozoic Era.
The life was miserable in the slavery era in South Africa.
Precambrian Era
Yes.
Cenozoic era
The Cenozoic Era has the greatest variety and quantity of mammalian life.
life was boring
The Paleozoic Era is also known as the age of ancient life.
The Paleozoic Era, because rich fossil evidence displays that early life in the time of the Paleozoic Era, there existed a dicersity of marine life.