Biology, 17.09.2019 02:00, brittainpolk453
The first organisms on earth appeared approximately 3.5 billion years ago and were all unicellular. multicellular organisms have only existed for about one billion years. what evolutionary milestone made it possible for more complex, multicellular organisms to exist?
Answers: 1
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The first organisms on earth appeared approximately 3.5 billion years ago and were all unicellular....
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