JimmyMf
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5. Which of the following accurately reflects the beliefs on Earth's early history? A. Scientists believe the early atmosphere lacked the oxygen necessary to support modern human life. B. Scientists believe that DNA may have existed before RNA. C. Scientists believe that microspheres nearly prevented the development of early life.

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The answer is (a.) Scientists believe the early atmosphere lacked the oxygen necessary to support modern human life.

The Theory of Spontaneous formation of organic molecules suggested that there are less oxygen to support the modern human life. In this theory, it is suggested that the abundant gases found in the atmosphere are CO2 and N2.