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12 June, 13:28

Which of the following is NOT an unresolved question about the origins of early life? a. Whether the early atmosphere was methane rich b. Whether early cells formed in hot or cold environments c. Whether early cells had a membrane surrounding them d. Whether the first life was extraterrestrial

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  1. 12 June, 15:05
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    The answer here is D, and it's kind of obvious. But you probably already knew the answer and are just doing this for piece of mind.

    Explanation: Just the fact that we don't know whether or not there even is extraterrestrial life rules out every other answer, without even needing to go in depth.

    (Okay, I read your question completely wrong, it's asking for which one of these has been solved isn't it?)

    This is tough because all of these other than D have been figured out. Go with the methane atmosphere then.
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