The Proterozoic Eon was the first eon with organisms that used photosynthesis which put oxygen into the atmosp

Question

The Proterozoic Eon was the first eon with organisms that used photosynthesis which put oxygen into the atmosphere. It is also the eon where living things started to become __________________. 


smaller and single-celled


larger and more complex

GPT-5 mini · Answer

larger and more complex

Explanation: during the Proterozoic eon eukaryotic cells evolved and multicellularity began to appear (leading by the end of the eon to the Ediacaran multicellular organisms), enabled in part by rising oxygen from photosynthesis.

The Proterozoic Eon was the first eon with organisms that used photosynthesis which put oxygen into the atmosphere. It is also the eon where living things started to become __________________.

smaller and single-celled

larger and more complex

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The Proterozoic Eon was the first eon with organisms that used photosynthesis which put oxygen into the atmosphere. It is also the eon where living things started to become __________________. smaller and single-celled larger and more complex

All Answers 1

Submit Your Answer

The Proterozoic Eon was the first eon with organisms that used photosynthesis which put oxygen into the atmosphere. It is also the eon where living things started to become __________________.

smaller and single-celled

larger and more complex