If the carbon isotope evidence does indicate life 3.85 billion years ago,it suggests that life must have been widespread at that point.

Question

Quizplus · Accepted Answer

The presence of carbon isotopes in rocks from 3.85 billion years ago indicates the existence of life at that time, and if life was present, it would have had to be widespread for this evidence to be found. Therefore, option A is correct.

If the Carbon Isotope Evidence Does Indicate Life 3