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Why do scientists believe that the first organisms on Earth were extremophiles?
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Why do scientists believe that the first organisms on Earth were extremophiles? a. Earth’s early environment was full of extreme places with much oxygen in the atmosphere, no ozone to shield Earth’s surface from mutagenic radiation, much geologic upheaval and volcanic activity. Extremophiles are bacteria and archaea that are adapted to grow in extreme environments. b. Earth’s early environment was full of extreme places with little oxygen in the atmosphere, no ozone to shield Earth’s surface from mutagenic radiation, much geologic upheaval and volcanic activity. Extremophiles are bacteria and archaea that are adapted to grow in extreme environments. c. Earth’s early environment was full of extreme places with little oxygen in the atmosphere, no ozone to shield Earth’s surface from mutagenic radiation, less geologic upheaval and volcanic activity. Extremophiles are bacteria and archaea that are adapted to grow in extreme environments. d. For the first two billion years of Earth's existence, the atmosphere had no molecular oxygen.
Why do scientists think that all forms of life on earth have a common origin?
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