Minick Rosing's analysis of microscopic globules of carbon found in rocks 3.7 billion years old showed that they were somewhat higher in ¹²C as opposed to ¹³C.This is significant because ________.

Question

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Living organisms preferentially incorporate ¹²C over ¹³C, leading to a higher proportion of ¹²C in their tissues. Therefore, the higher proportion of ¹²C in the microscopic carbon globules indicates the presence of living organisms in the ancient environment. This is significant because it provides evidence for the existence of life on Earth at least 3.7 billion years ago.

Minick Rosing's Analysis of Microscopic Globules of Carbon Found in Rocks