Given this information, the correct answer would reveal why carbon 14 in the rocks does not necessarily mean life existed on land 1.2 billion years ago. Answer D (Correct): This option states the carbon 14 in the rocks came from atmospheric deposition, not from plants or microbes. Thus, it does not support the conclusion about early land life.
Given this information, the correct answer would reveal why carbon 14 in the rocks does not necessarily mean life existed on land 1.2 billion years ago. Answer D (Correct): This option states the carbon 14 in the rocks came from atmospheric deposition, not from plants or microbes. Thus, it does not support the conclusion about early land life.