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Precambrian Era: Early Lifeforms and Fossil Evidence
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Which of the following is the earliest known fossil evidence of life on Earth?
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A
Stromatolites
💡 Explanation:
Stromatolites are layered mounds or columns of sediment that are formed by the growth of cyanobacteria. They are the earliest known fossil evidence of life on Earth, dating back to around 3.5 billion years ago.