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Project Relife: 2x Isekai System

Dear Xin, Nyaa~~~ I hope you are fine. I think it's your first day on earth. I wish you success in your revenge. And hope this time the world won't get destroyed like the last time. Since there is a charge on the number of characters I am using right now, I am keeping it short and simple. The last time the magical world got destroyed, we tried to reverse time and send your soul there. But due to some unforeseen circumstances, we were unable to do so. Since trillions of souls were on the line, we decided to merge your earth and the magic world into one. We have successfully planted the magic world's characters on your earth, and for magic, we will add it within a month. Hope you enjoy your stay there. Nyaa~~ Itsuki out~~~

TokyoAnime_Seven · Fantaisie
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LUCY, Really?!

However, during the Proterozoic, a large evolutionary step occurred with the appearance of eukaryotes. 

Evolving around 2.1-1.6 billion years ago, eukaryotic cells are more complex with cell organelles and a nucleus with more complex DNA replication and regulation, mitochondria for additional energy, and chloroplasts to perform photosynthesis and produce energy.

  Certain organelles even have their own DNA, like mitochondria. Eukaryotes are the branch of the tree of life that gave rise to fungi, plants, and animals.

  About 1.2 billion years ago, another important event in Earth's biological history occurred when some eukaryotes invented reproducion.

  By sharing genetic material between reproducing individuals (male and female), evolutionary change was enhanced by increasing genetic variability. This allowed more complexity among individual organisms, and eventually, ecosystems.