Correctly match the definition with the correct geologic time period.
-origin of life; photosynthesis causes oxygen content of Earth's atmosphere to increase; first eukaryotes; first multicellular organisms; 540 mya-3.8 bya

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This period includes the origin of life, the increase in oxygen content due to photosynthesis, the first eukaryotes, and the first multicellular organisms. It encompasses a vast amount of time from 3.8 billion years ago to 540 million years ago and is divided into three sub-eras: the Hadean, Archean, and Proterozoic.

Correctly Match the Definition with the Correct Geologic Time Period