QUESTION #8 - WRONG!!!

No. Billions of years ago, the Earth was forming, and simple life forms had just begun to evolve.
Proterozoic Eon
2.5 billion years ago to
540 mya
Vendian Period
600 to 540 Million Years Ago
Vendian biota (Ediacara fauna), multi-celled, animals appear, including sponges. A mass extinction occurred. The continents had merged into a single supercontinent called Rodinia.
- First multicellular life: colonial algae and soft-bodied invertebrates appear. Oxygen build-up in the Mid-Proterozoic.
Archeozoic Eon
(Archean)

3.9 to 2.5 billion years ago
- "Ancient Life" - The first life forms evolve - one celled organisms. Blue-green algae, archaeans, and bacteria< appear in the sea. This begins to free oxygen into the atmosphere.
Hadean Eon
4.6 to 3.9 billion years ago
- "Rockless Eon" - The solidifying of the Earth's continental and oceanic crusts.


Back to Question #8





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