During which era was the earth dominated by mostly single-celled organisms?

Question

Biology

Guest

10 December, 23:54

During which era was the earth dominated by mostly single-celled organisms?

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Answers (2)

Know the Answer?

Lindsay Cantrell · Answer 1

I think it's Proterozoic era where life on Earth was mostly single-celled and small.

Landon Chang · Answer 2

The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.