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Which bits of evidence would convince you that life originated as early as 3.2 BYA?a. You look at a microfossil under a scanning electron microscope and it is the same shape as a cell.b. A high-quality transmission electron micrograph of a fossil cell reveals cellular compartments, including a possible nucleus.c. Potassium dating of a fossil containing a possible cell indicates that the fossil is 3.2 billion years old.d. Using transmission and scanning electron microscopy, you find evidence of a carbon-based material in what appears to be a cell wall of a fossil isotopically dated as 3.2 billion years old.
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