How exactly did the first living cell on earth come to originate ?
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The first cell is thought to have arisen by the enclosure of self-replicating RNA and associated molecules in a membrane composed of phospholipids.
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IT appears that life first emerged at least 3.8 billion years ago, approximately 750 million years after Earth was formed. How life originated and how the first cell came into being are matters of speculation, since these events cannot be reproduced in the laboratory. Nonetheless, several types of experiments provide important evidence bearing on some steps of the process.Time scale of evolution.
The scale indicates the approximate times at which some of the major events in the evolution of cells are thought to have occurred.
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