Proterozoikum period (2.5 billion - 290 million years ago)
Proterozoikum means the initial period of life.
The period is early Proterozoikum form hidrosfer and the atmosphere. At this time of life began to develop from single cell organisms to be many cells (enkaryotes and prokaryotes).
If the terms at this biology, it should have been taught in junior? This will be Enkaryotes plants and prokaryotes will later become a beast.
Towards the end of this more complex organism, the type of software as well invertebrates jellyfish, worms and coral start to appear in the shallow seas, the evidence-evidence found as a first fossil.
Period Arkeozoikum and Proterozoikum together known as the Pre-Kambrium.
Kambrium era (590-500 million years ago)
Kambrium comes from the word "Cambria" latin name for the Anglo-Welsh in there, where the rock was first kambrium learned.
Many invertebrates animals start to appear at the time of Kambrium. Almost all life in the sea. Animals have this time of the framework and outside the body shell as masks.
Common fossil found is broad and spreading, Alga, worms, sponge, coral, Moluska, Ekinodermata, Brakiopoda and Artropoda (Trilobit).
A land called Gondwana (previous pannotia) is the embryo of Antarctica, Africa, India, Australia, parts of Asia and South America. While Europe, North America, and Greenland is still a continent-continent small separate.
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